Coal seam adaptive reaming pressure relief method and device based on high static load identification

Abstract

The present disclosure relates to a coal seam adaptive reaming pressure relief method and device based on high static load identification. Among them, the method includes: obtaining a plurality of monitoring index data of an initial borehole in a coal seam at each borehole depth position; using the plurality of monitoring index data corresponding to each borehole depth position to determine the change situation of the static load accumulation index distribution; determining the stable value of the static load accumulation index and the corresponding first pulverized coal weight; selecting a high static load accumulation area according to the stable value and the change situation of the static load accumulation index distribution; for each target borehole depth position in the high static load accumulation area, determining the target pulverized coal weight corresponding to the target borehole depth position; performing a reaming pressure relief operation at the target borehole depth position until the second pulverized coal weight corresponding to the target borehole depth position is equal to the target pulverized coal weight. This solution can ensure that the high static loads at different depth positions in the coal seam can be fully released.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal mining, and particularly to a method and device for self-adaptive hole enlargement and pressure relief of coal seams based on high static load identification. Background Art

[0002] Rock burst is one of the main dynamic disasters faced in coal mining. In hard coal seams, a large amount of elastic energy will accumulate under the action of high static load, and it is extremely easy to induce rock burst under high-intensity mining disturbances.

[0003] Currently, the method of drilling a large number of holes in the coal seam is usually adopted. The deformation and collapse of the holes are used to release the high static load accumulated in the coal seam, and the high static load accumulation area at the rib of the coal seam is transferred to the deep part of the coal seam, thereby reducing the risk of rock burst disasters. Research shows that the borehole diameter is closely related to the pressure relief ability. The larger the borehole diameter, the higher the degree of release of the static load. However, during the current drilling construction, the borehole diameter remains fixed and is not dynamically adjusted according to the different static load accumulation degrees at different depths of the borehole. The high static load accumulated in the coal seam is not fully released, resulting in low precision and efficiency in the treatment of rock burst disasters. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a method and device for self-adaptive hole enlargement and pressure relief of coal seams based on high static load identification.

[0005] According to the first aspect of the embodiments of the present disclosure, a method for self-adaptive hole enlargement and pressure relief of coal seams based on high static load identification is provided, including:

[0006] Obtaining a plurality of monitoring index data related to the static load accumulation degree at each hole depth position of an initial borehole in the coal seam;

[0007] For each hole depth position, using the plurality of monitoring index data corresponding to the hole depth position, calculating the static load accumulation index of the coal seam at the hole depth position;

[0008] Using the static load accumulation index corresponding to each hole depth position, determining the stable value of the static load accumulation index, and determining the weight of the pulverized coal generated at the hole depth position corresponding to the stable value, to obtain the first pulverized coal weight; the pulverized coal weight is the weight of the pulverized coal generated during the drilling operation at the corresponding hole depth position in the initial borehole;

[0009] Selecting a high static load accumulation area from the initial borehole according to the stable value and the static load accumulation index corresponding to each hole depth position;

[0010] For each target hole depth position in the high static load accumulation area, the following steps are sequentially executed to complete the self-adaptive hole enlargement and pressure relief at different target hole depth positions in the initial borehole:

[0011] Determine the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index corresponding to the target hole depth position, the stable value, and the first pulverized coal weight;

[0012] Perform a hole enlargement and pressure relief operation at the target hole depth position until the second pulverized coal weight generated by the hole enlargement at the target hole depth position is equal to the target pulverized coal weight.

[0013] In the embodiment of the present application, the determining the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index corresponding to the target hole depth position, the stable value, and the first pulverized coal weight includes:

[0014] Determine the proportion of the static load accumulation index corresponding to the target hole depth position in the stable value to obtain the aperture adaptive adjustment coefficient of the target hole depth position;

[0015] Calculate the product of the aperture adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight of the target hole depth position.

[0016] In the embodiment of the present application, the determining the stable value of the static load accumulation index by using the static load accumulation index corresponding to each hole depth position includes:

[0017] Use the static load accumulation index corresponding to each hole depth position to generate a first distribution curve of the static load accumulation index and the drilling depth;

[0018] Perform non-linear fitting on the first distribution curve to obtain the fitted first distribution curve;

[0019] Perform a first derivative on the fitted first distribution curve to obtain a first derivative result;

[0020] According to the first derivative result, select the static load accumulation index corresponding to the target position where the derivative of the fitted first distribution curve is less than or equal to the first threshold as the stable value; wherein, the static load accumulation index corresponding to the target position is not the peak value of the static load index.

[0021] In the embodiment of the present application, the calculating the static load accumulation index of the coal seam at the hole depth position by using the multiple monitoring index data corresponding to the hole depth position includes:

[0022] For each monitoring index data among the multiple monitoring index data corresponding to the hole depth position, calculate the correlation index value between the monitoring index data and the other monitoring index data except the monitoring index data among the multiple monitoring index data;

[0023] For each piece of monitoring index data, calculate the volatility index value of the monitoring index data based on the multiple pieces of monitoring index data;

[0024] For each piece of monitoring index data, calculate the product of the correlation index value and the volatility index value of the monitoring index data to obtain the information amount of the monitoring index data;

[0025] Based on the information amount of each piece of monitoring index data, calculate the weight value corresponding to each piece of monitoring index data;

[0026] Perform weighted summation on the multiple pieces of monitoring index data according to the weight value corresponding to each piece of monitoring index data to obtain the static load accumulation index of the coal seam at the hole depth position;

[0027] In the embodiment of the present application, after determining the ratio of the static load accumulation index corresponding to the target hole depth position in the stable values to obtain the hole diameter adaptive adjustment coefficient of the target hole depth position, it further includes:

[0028] Compare the hole diameter adaptive adjustment coefficient with a preset second threshold to obtain a comparison result;

[0029] In the case where the comparison result is that the hole diameter adaptive adjustment coefficient is greater than or equal to the second threshold, perform the step of calculating the product of the hole diameter adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight at the target hole depth position.

[0030] In the embodiment of the present application, after completing the adaptive hole expansion and pressure relief at different target hole depth positions in the initial borehole, it further includes:

[0031] For each hole depth position, obtain the first discharge speed of the pulverized coal during the hole expansion and pressure relief operation;

[0032] According to each hole depth position and its corresponding first discharge speed, generate a second distribution curve of the first discharge speed and the hole depth position;

[0033] Determine the target borehole depth interval according to the second distribution curve;

[0034] Within the borehole depth interval, control the drill bit of the drilling rig to perform a one-way hole expansion and pressure relief operation according to the first configuration parameters to complete the pressure relief hole expansion operation of the current round; the first configuration parameters include rotation speed, torque, thrust, and propulsion speed;

[0035] Assign the first discharge speed as the second discharge speed of the pulverized coal during the reaming and pressure relief operation of the current round, and return to execute the step of generating the second distribution curve of the first discharge speed and the hole depth position according to each hole depth position and its corresponding first discharge speed until the length of the drilling depth interval is less than or equal to a preset fourth threshold value.

[0036] In the embodiment of the present application, the determining the target drilling depth interval according to the second distribution curve includes:

[0037] Perform a first derivative of the second distribution curve to obtain a second derivative result;

[0038] Select the drilling depth interval corresponding to the region where the derivative is greater than a preset third threshold value from the second distribution curve according to the second derivative result.

[0039] According to the second aspect of the embodiments of the present disclosure, there is provided a coal seam adaptive reaming and pressure relief device based on high static load identification, including:

[0040] An acquisition unit for acquiring a plurality of monitoring index data related to the static load accumulation degree at each hole depth position of the initial drill hole in the coal seam;

[0041] A calculation unit for calculating the static load accumulation index of the coal seam at the hole depth position by using the plurality of monitoring index data corresponding to the hole depth position for each hole depth position;

[0042] A determination unit for using the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index and determine the weight of the pulverized coal generated at the hole depth position corresponding to the stable value to obtain a first pulverized coal weight; the pulverized coal weight is the weight of the pulverized coal generated by drilling at the corresponding hole depth position in the initial drill hole;

[0043] A selection unit for selecting a high static load accumulation region from the initial drill hole according to the stable value and the static load accumulation index corresponding to each hole depth position;

[0044] A pressure relief unit for sequentially performing the following steps for each target hole depth position in the high static load accumulation region to complete the adaptive reaming and pressure relief at different target hole depth positions in the initial drill hole:

[0045] A determination subunit for determining the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, the stable value, and the first pulverized coal weight corresponding to the target hole depth position;

[0046] An under-reaming sub-unit for performing under-reaming pressure relief operation at the target hole depth position until the weight of the second pulverized coal generated by under-reaming at the target hole depth position is equal to the target pulverized coal weight.

[0047] According to a third aspect of the embodiments of the present disclosure, an electronic device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method described in any one of the first aspects is implemented.

[0048] According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method described in any one of the first aspects is implemented.

[0049] According to a fifth aspect of the embodiments of the present disclosure, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method described in any one of the first aspects is implemented.

[0050] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: by obtaining multiple monitoring index data related to the static load accumulation degree at each hole depth position of the initial borehole in the coal seam; using the multiple monitoring index data corresponding to each hole depth position to calculate the static load accumulation index of the coal seam at each hole depth position; using the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index and the weight of the pulverized coal generated at the hole depth position corresponding to the stable value, to obtain the first pulverized coal weight; according to the stable value and the static load accumulation index corresponding to each hole depth position, selecting a high static load accumulation area from the initial borehole; for each target hole depth position in the high static load accumulation area, determining the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, stable value, and first pulverized coal weight corresponding to the target hole depth position; performing under-reaming pressure relief operation at the target hole depth position until the weight of the second pulverized coal generated by under-reaming at the target hole depth position is equal to the target pulverized coal weight, to complete the adaptive under-reaming pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing under-reaming operation according to the static load accumulation degree at different hole depth positions in the coal seam, making the borehole diameter adaptively match the impact hazard, and further ensuring that the high static loads at different depth positions in the coal seam can be fully released, effectively improving the borehole pressure relief effect and the prevention and control effect of rock burst disasters.

[0051] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present invention, and are used together with the specification to explain the principles of the present invention.

[0053] Figure 1 is a flowchart of a coal seam adaptive reaming pressure relief method based on high static load identification shown according to an exemplary embodiment.

[0054] Figure 2 is a schematic diagram of the first distribution curve proposed in the embodiments of the present disclosure.

[0055] Figure 3 is a schematic diagram of the stable value and the high static load accumulation area proposed in the embodiments of the present disclosure.

[0056] Figure 4 is a schematic diagram of the drill bit reciprocatingly moving and reaming in the borehole proposed in the embodiments of the present disclosure.

[0057] Figure 5 is a schematic diagram of the second distribution curve proposed in the embodiments of the present disclosure.

[0058] Figure 6 is a schematic diagram of the comparison between the current reaming area and the next reaming area proposed in the embodiments of the present disclosure.

[0059] Figure 7 is a schematic diagram of the process for adaptively adjusting the borehole diameter proposed in the embodiments of the present disclosure.

[0060] Figure 8 is a block diagram of a coal seam adaptive reaming pressure relief device based on high static load identification shown according to an exemplary embodiment.

[0061] Figure 9 is a block diagram of a device for a coal seam adaptive reaming pressure relief method based on high static load identification shown according to an exemplary embodiment.

[0062] Reference numerals

[0063] 1 - Initial borehole; 2 - Borehole wall after reaming; 3 - High static load accumulation area; 4 - Current hydraulic reaming area; 5 - Next hydraulic reaming area; 6 - Borehole wall after the first reaming; 7 - Borehole wall after the second reaming; 8 - Borehole wall after the third hydraulic reaming. Detailed implementation manners

[0064] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0065] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0066] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0067] In addition, various forms of processes shown in the embodiments of the present disclosure can be used, reordering, adding or deleting steps. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and no limitation is made herein.

[0068] Rock burst is one of the main dynamic disasters faced in coal mining. Hard coal seams will accumulate a large amount of elastic energy under the action of high static loads and are extremely prone to rock burst under high-intensity mining disturbances.

[0069] Currently, the method of drilling a large number of holes in the coal seam is usually adopted, and the deformation and collapse of the holes are used to release the high static loads accumulated in the coal seam, and the high static load accumulation area in the rib of the coal seam is transferred to the deep part of the coal seam, thereby reducing the risk of rock burst disasters. Research shows that the borehole diameter is closely related to the pressure relief capacity. The larger the borehole diameter, the higher the degree of release of the static load. However, during the current borehole construction, the borehole diameter remains fixed and is not dynamically adjusted according to the different static load accumulation degrees at different depths of the borehole. The high static loads accumulated in the coal seam are not fully released, resulting in low precision and efficiency in the treatment of rock burst disasters.

[0070] In addition, the following problems currently exist in drilling: the hole spacing of drilling is usually 100 - 300 mm, resulting in a large amount of construction work and a heavy economic burden; the pressure relief drilling has timeliness. As time goes by, the drilling holes gradually close, losing the pressure relief effect, and the high static load environment in the hard coal seam is restored again, increasing the risk of rock burst; the drilling hole diameter is limited, the pressure relief range of a single hole is small, and the prevention and control effect of rock burst is limited.

[0071] To solve the above problems, the present disclosure provides a method and device for self - adaptive reaming pressure relief of coal seams based on high static load identification. By obtaining multiple monitoring index data related to the static load accumulation degree at each hole depth position of the initial drilling holes in the coal seam; using the multiple monitoring index data corresponding to each hole depth position to calculate the static load accumulation index of the coal seam at each hole depth position; using the static load accumulation index corresponding to each hole depth position respectively to determine the stable value of the static load accumulation index and the weight of pulverized coal generated at the hole depth position corresponding to the stable value, obtaining the first pulverized coal weight; according to the stable value and the static load accumulation index corresponding to each hole depth position respectively, selecting the high static load accumulation area from the initial drilling holes; for each target hole depth position in the high static load accumulation area, determining the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, stable value and the first pulverized coal weight corresponding to the target hole depth position; performing a reaming pressure relief operation at the target hole depth position until the second pulverized coal weight generated by reaming at the target hole depth position is equal to the target pulverized coal weight, so as to complete the self - adaptive reaming pressure relief at different target hole depth positions in the initial drilling holes, thereby achieving the purpose of adaptively performing reaming operations according to the static load accumulation degree at different hole depth positions in the coal seam, making the drilling hole diameter adaptively match the impact hazard, and further ensuring that the high static loads at different depth positions in the coal seam can be fully released, effectively improving the pressure relief effect of drilling and the prevention and control effect of rock burst disasters.

[0072] Figure 1 is a flowchart of a method for self - adaptive reaming pressure relief of coal seams based on high static load identification shown according to an exemplary embodiment. As Figure 1 shown, it should be noted that the method for self - adaptive reaming pressure relief of coal seams based on high static load identification in the embodiments of the present disclosure is applied to a device for self - adaptive reaming pressure relief of coal seams based on high static load identification. As Figure 1 shown, the method may include the following steps:

[0073] Step 101, obtain multiple monitoring index data related to the static load accumulation degree at each hole depth position of the initial drilling holes in the coal seam.

[0074] It should be noted that before reaming, it is necessary to first drill holes in the coal seam according to a preset size to obtain the above - mentioned initial drilling holes.

[0075] In one embodiment, the above-mentioned multiple monitoring index data may include any of the following indexes: coal powder weight (unit: Kg / m), rotational speed (unit: r / min), torque (N•m), thrust force (N), and thrust speed (unit: m / s).

[0076] As an example, the drilling parameter sensor group may include any of the following: a coal powder sensor for monitoring the coal powder weight, a rotational speed sensor for monitoring the rotational speed of the drill bit, a torque sensor for monitoring the output torque of the drill bit, a thrust force sensor for monitoring the thrust force of the drill bit, and a thrust speed sensor for monitoring the thrust speed of the drill bit.

[0077] In a possible implementation manner, during the data acquisition process, the data information of each interval segment is obtained. Taking the drilling depth of 20m as an example, the average value of the above-mentioned index data monitored for every 0.5m hole depth is obtained to form a data set, and then 40 data sets are obtained for each drill hole.

[0078] In some embodiments of the present application, before step 102, the above-mentioned monitoring index data can also be subjected to dimensionality reduction processing, that is, by converting the data into a dimensionless form to eliminate the influence of different dimensions on data analysis. The normalization method is used to perform dimensionality reduction processing through the following steps:

[0079] Formula 1:

[0080] Or, Formula 2:

[0081] Wherein, represents the value of the index after dimensionless processing, represents the value of the index before dimensionless processing, represents the th data in the data set of this index, represents the minimum value of this index, represents the maximum value of this index.

[0082] It is possible to determine whether to specifically use Formula ① or the formula to perform dimensionality reduction processing on the monitoring index data according to the positive or negative correlation between different monitoring index data and the static load accumulation degree:

[0083] For the coal powder weight, since the coal powder weight reflects the intensity of coal body fragmentation and energy release during the drilling process. In areas with a high degree of static load accumulation, the coal body is in a high-stress state. After drilling, the cracks in the surrounding coal body expand more violently, and the fragmentation range increases, resulting in a significant increase in the discharged coal powder weight. Therefore, Formula 1 is used for this monitoring index data;

[0084] Regarding the rotational speed and torque, since the pressure in the static load concentration area of the coal seam is relatively high, the rotational resistance moment of the drilling tool increases. Research shows that when the confining pressure of the borehole increases from 10 kPa to 40 kPa, the rotational resistance moment of the casing drilling tool can increase by more than 4 times. To avoid overloading the drilling rig, it is necessary to reduce the rotational speed and increase the torque. Therefore, the rotational speed parameter uses Formula 2, and the torque parameter uses Formula 1;

[0085] Regarding the thrust force, since the axial resistance of the coal body in the high static load area of the coal seam increases with the increase of the confining pressure, and the thrust force needs to overcome the axial resistance of the coal body, a larger thrust force is required to ensure the drilling efficiency when drilling in the high static load area of the coal body. Therefore, the data of this monitoring index uses Formula 1;

[0086] Regarding the penetration rate, since the penetration rate affects the coal powder discharge efficiency and the borehole stability, the coal seam in the high static load area is hard, and the drilling speed decreases to ensure the drilling efficiency. Therefore, the data of this monitoring index uses Formula 2.

[0087] Step 102, for each hole depth position, use the multiple monitoring index data corresponding to the hole depth position to calculate the static load accumulation index of the coal seam at the hole depth position.

[0088] In one embodiment, the static load accumulation index can reflect the degree of static load accumulation at a certain hole depth position, and can be calculated based on any multiple of the indicators such as coal powder weight, rotational speed, torque, thrust force, and penetration rate.

[0089] In some embodiments of the present application, the calculation of the static load accumulation index of the coal seam at the hole depth position by using the multiple monitoring index data corresponding to the hole depth position proposed in Step 102 may specifically include the following steps:

[0090] Step a1, for each monitoring index data among the multiple monitoring index data corresponding to the hole depth position, calculate the correlation index value between the monitoring index data and the other monitoring index data except the monitoring index data among the multiple monitoring index data.

[0091] In one embodiment, the following formula can be used to calculate the correlation index value:

[0092]

[0093] In the formula, is the correlation index value between the i-th index and other indexes, is the absolute value of the correlation coefficient between the i-th index and the j-th index.

[0094]

[0095] In the formula, is the correlation coefficient between the i-th index and the j-th index, n is the amount of index data, and m is the m-th data in the index dataset. is the average value of the data of the i-th index. is the average value of the data of the j-th index.

[0096] Step a2: For each monitoring index data, calculate the volatility index value of the monitoring index data based on multiple monitoring index data.

[0097] In one embodiment, the following formula can be used to calculate the volatility index value :

[0098] .

[0099] Step a3: For each monitoring index data, calculate the product of the correlation index value and the volatility index value of the monitoring index data to obtain the information amount of the monitoring index data.

[0100] In one embodiment, the following formula can be used to calculate the information amount of the monitoring index data :

[0101] .

[0102] Step a4: Based on the information amount of each monitoring index data, calculate the weight value corresponding to each monitoring index data.

[0103] In one embodiment, the following formula can be used to calculate the weight value corresponding to the i-th monitoring index data :

[0104]

[0105] where i = 1, 2, 3, 4, 5, that is, sum the information amounts of the 5 monitoring index data respectively to obtain a sum value, and determine the proportion of the information amount of the i-th monitoring index data in the above sum value.

[0106] Step a5: Perform weighted summation on multiple monitoring index data according to the weight value corresponding to each monitoring index data to obtain the static load accumulation index of the coal seam at the hole depth position.

[0107] In one embodiment, the following formula can be used to calculate the static load accumulation index SLAI:

[0108]

[0109] In the formula, is the value after the dimensionality reduction processing of the i-th monitoring index data.

[0110] In the embodiments of the present application, the degree of static load accumulation at each hole depth position in the borehole is comprehensively evaluated from two aspects of the correlation and stability of the index monitoring index data, which improves the rationality and accuracy of the evaluation results. Furthermore, the degree of hole expansion at each hole depth position can be determined, enabling the borehole diameter to adaptively match the degree of static load accumulation, ensuring that the high static loads at different depth positions of the borehole can be fully released, and effectively improving the borehole pressure relief effect and the prevention and control effect of rock burst disasters.

[0111] Step 103: Using the static load accumulation index corresponding to each hole depth position, determine the stable value of the static load accumulation index and the weight of the pulverized coal generated at the hole depth position corresponding to the stable value, to obtain the first pulverized coal weight.

[0112] Wherein, the pulverized coal weight is the weight of the pulverized coal generated during the drilling operation at the corresponding hole depth position in the initial borehole.

[0113] It can be understood that at different depth positions from the hole mouth to the hole bottom in the borehole, the degree of static load accumulation shows a changing trend of increasing first, then decreasing, and then remaining stable. And within the region where the static load is stable, the static load has no obvious change and maintains a relatively stable state. Therefore, based on the numerical distribution change of the static load accumulation index corresponding to each hole depth position in the initial borehole, the value of the static load accumulation index in the stable state can be selected as the stable value, that is, the value of the static load accumulation index in the non-fluctuating state is selected as the stable value.

[0114] In some embodiments of the present application, the step of using the static load accumulation index corresponding to each hole depth position in step 103 to determine the stable value of the static load accumulation index may specifically include the following steps:

[0115] Using the static load accumulation index corresponding to each hole depth position, generate a first distribution curve of the static load accumulation index and the borehole depth;

[0116] Perform non-linear fitting on the first distribution curve to obtain the fitted first distribution curve;

[0117] Perform the first derivative on the fitted first distribution curve to obtain the first derivative result;

[0118] According to the first derivative result, select the static load accumulation index corresponding to the position where the derivative of the fitted first distribution curve is less than or equal to the first threshold as the stable value. Wherein, the static load accumulation index corresponding to the target position is not the peak value of the static load index.

[0119] It should be noted that the above first threshold is equal to 0 or approaches 0. For example, the first threshold can be set to 0.5 or 1.

[0120] In one embodiment, the first distribution curve is as follows Figure 2 shown. The horizontal axis is the drilling depth, and the vertical axis is the static load accumulation index. The static load accumulation index SLAI slowly increases from 0 to the peak value of 1, and then gradually decreases and stabilizes at about 0.4. By taking the first derivative of the first distribution curve, the stable value of the static load accumulation index can be accurately calculated, that is, the drilling depth position where the static load accumulated in the coal seam is within the safe range and its corresponding static load accumulation index can be determined.

[0121] As Figure 3 shown, according to the first distribution curve of the static load accumulation index and the drilling depth, first obtain the stable value of the static load accumulation index (for example Figure 3 in it is 0.4, and the mathematical calculation method is to perform nonlinear fitting on the curve, and then take the first derivative of the curve obtained after nonlinear fitting. When the derivative is 0 or close to 0, that is, at the drilling depth of 17.2 m, the stable value of the static load accumulation index is 0.4).

[0122] Step 104, select the high static load accumulation area from the initial drill holes according to the stable value and the static load accumulation index corresponding to each hole depth position.

[0123] In one embodiment, the area higher than the static load stable value in the drilling depth interval of the initial drill hole is the high static load accumulation area HSLA (for example Figure 3 in it, the high static load accumulation area 3 is the area with a drilling depth of 1.8 - 17.2 m). The larger the value of this index, the greater the impact danger influence range of the high static load accumulation area.

[0124] For each target hole depth position in the high static load accumulation area, the following steps 105 - 106 are sequentially executed to complete the adaptive reaming pressure relief at different target hole depth positions in the initial drill hole:

[0125] Step 105, determine the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, stable value, and the first pulverized coal weight corresponding to the target hole depth position.

[0126] It is understood that in order to achieve sufficient pressure relief at the target hole depth position, it is necessary to adjust the static load accumulation degree at this position from a high value to a low value through reaming. The static load accumulation degree is characterized by the static load accumulation index, and the stable value of the static load accumulation index represents a low value of the static load accumulation degree. Therefore, there is a certain mapping relationship between the target pulverized coal weight to be discharged corresponding to the static load accumulation index at the target hole depth position and the first pulverized coal weight generated at the stable value hole depth position corresponding to the static load accumulation index. According to this mapping relationship, the target pulverized coal weight required for reaming at the target hole depth position can be determined by using the static load accumulation index corresponding to the target hole depth position, the stable value of the static load index, and the first pulverized coal weight.

[0127] Step 106, perform a reaming pressure relief operation at the target hole depth position until the second pulverized coal weight corresponding to the target hole depth position is equal to the target pulverized coal weight.

[0128] In one embodiment, the above reaming pressure relief operation can adopt the method of hydraulic reaming. That is, after the construction of a large-diameter borehole is completed, the hydraulic reaming device of the drill bit is turned on. The drill pipe connected to the drill bit is a double-layer high-pressure sealed drill pipe. The inner layer of the drill pipe is a high-pressure waterway, which is connected to the water outlet at the front end of the drill bit; the outer layer of the drill pipe is a low-pressure waterway, which is connected to the water outlet at the outer end of the drill bit. After the hydraulic reaming device is opened, the drill rig is controlled to rotate the drill bit to cut the coal body and reciprocate in the hydraulic reaming area so that the pulverized coal can be discharged out of the hole in time. During the hydraulic reaming process, high-pressure water is sprayed from the water outlet at the front end of the drill bit to cut the coal body and expand the borehole diameter; low-pressure water is sprayed from the water outlet at the outer end of the drill bit to discharge the pulverized coal generated by the cutting of the high-pressure water.

[0129] As an example, during the process of reaming a certain target hole depth position with a drill bit, the discharged pulverized coal (i.e., the second pulverized coal weight) can be continuously weighed. When the discharged second pulverized coal weight is equal to the target pulverized coal weight, it indicates that the reaming pressure relief at this target hole depth position has been completed.

[0130] In some embodiments of the present application, step 105 may specifically include the following steps:

[0131] Step b1, determine the occupancy ratio of the static load accumulation index corresponding to the target hole depth position in the stable value to obtain the aperture adaptive adjustment coefficient of the target hole depth position;

[0132] Step b2, calculate the product of the aperture adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight at the target hole depth position.

[0133] It can be understood that an aperture adaptive adjustment coefficient can be adopted to accurately quantify the mapping relationship between the first pulverized coal weight and the target pulverized coal weight, so that the weight of the pulverized coal to be discharged at the target hole depth position can be accurately calculated according to the first pulverized coal weight, thereby accurately controlling the degree of borehole diameter expansion, and finally fully releasing the accumulated high static load.

[0134] In one embodiment, the aperture adaptive adjustment coefficient A can be calculated using the following formula L :

[0135] A L =HSLA L / HSLA C

[0136] Wherein, HSLA L is the static load accumulation index corresponding to the target hole depth position, and HSLA C is the stable value of the static load accumulation index.

[0137] In one embodiment, the target pulverized coal weight AD at the target hole depth position can be calculated using the following formula L :

[0138] AD L =A L *AD C

[0139] Wherein, AD C is the first pulverized coal weight generated at the hole depth position corresponding to the stable value of the static load index.

[0140] In some embodiments of the present application, after step b1, the method may further include:

[0141] Comparing the aperture adaptive adjustment coefficient with a preset second threshold to obtain a comparison result;

[0142] In the case where the comparison result is that the aperture adaptive adjustment coefficient is greater than or equal to the preset threshold, step b2 is executed.

[0143] It should be noted that the above second threshold (i.e., the aperture adaptive adjustment coefficient threshold) can be preset according to actual needs.

[0144] In one embodiment, the aperture adaptive adjustment coefficient A L can be compared with the second threshold TA L , and in the case of A L ≥TA L , calculate the product of the aperture adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight at the target hole depth position, and execute subsequent steps to complete the hole expansion and pressure relief operation.

[0145] In another embodiment, at A L <TA L In the case of, it is stated that the degree of static load accumulation is within an acceptable range, that is, within a safe range, and the hole - enlarging pressure - relief operation may not be performed at the current hole - depth position.

[0146] In some embodiments of the present application, after the construction of large - diameter borehole hydraulic hole - enlarging is completed, the distribution of high static load accumulation at different depth positions in the borehole is changed, and the high static load is effectively released. Based on the conservative principle, to further check whether there are missed high - static - load - accumulation areas and perform supplementary hydraulic hole - enlarging on them, the supplementary hydraulic hole - enlarging area is adjusted in real - time and accurately according to the index of the coal - powder discharge speed ADSL, so as to further fully relieve the high static load accumulated in the coal seam. After the adaptive hole - enlarging pressure - relief at different target hole - depth positions in the initial borehole is completed, the method further includes:

[0147] Step c1, for each hole - depth position, obtain the first discharge speed of the coal powder during the hole - enlarging pressure - relief operation.

[0148] It should be noted that during the hydraulic hole - enlarging process, the water jet cuts and damages the coal body, and the coal body in the high - static - load area is more likely to crack, and the crack propagation is accelerated, thereby releasing more coal powder. There is a positive correlation between the coal - powder discharge speed and the degree of high - static - load accumulation, that is, the area with a high coal - powder discharge speed has a high degree of high - static - load accumulation. Therefore, when the coal - powder discharge speeds at different positions in the area are the same or similar, it indicates that the degree of static - load accumulation in this area is the same or similar, that is, there is no obvious high - static - load - accumulation area, indicating that the high static load in this area has been fully and completely released.

[0149] In one embodiment, the first discharge speed is the weight of the coal powder discharged per unit time during hydraulic hole - enlarging at different hole - depth positions L. The first discharge speed ADSL of the coal powder monitored and obtained during each individual forward (or return) operation process is a data set.

[0150] Step c2, according to each hole - depth position and its corresponding first discharge speed, generate a second distribution curve of the first discharge speed and the hole - depth position.

[0151] Step c3, determine the target borehole depth interval according to the second distribution curve.

[0152] In one embodiment, the area where high static load still exists in the borehole can be determined according to the second distribution curve, so as to further supplement the hole - enlarging in this area.

[0153] In some embodiments of the present application, step c3 may specifically include the following steps:

[0154] Perform a first derivative operation on the second distribution curve to obtain a second derivative result;

[0155] Select, from the second distribution curve according to the second derivative result, the drilling depth interval corresponding to the region where the derivative is greater than a preset third threshold.

[0156] It should be noted that the preset third threshold is 0 or a number approaching 0. For example, the preset third threshold can be 1 or 0.5.

[0157] In one embodiment, as Figure 5 shown, based on the dataset of the coal powder discharge speed ADSL monitored during each individual forward or return journey (i.e., the same reaming round) operation process, establish a second distribution curve of the coal powder discharge speed ADSL and the drilling depth, and perform a first derivative operation to obtain the region LR1 where the derivative is greater than 0. The corresponding range of LR1 is the above-mentioned drilling depth interval, that is, the region where supplementary hydraulic reaming should be performed during the next individual forward or return journey operation process. It can be Figure 5 seen that the above-mentioned hydraulic reaming region is inside the high static load accumulation region 3.

[0158] Step c4, within the drilling depth interval, control the drill bit of the drilling rig to perform a one-way reaming pressure relief operation according to the first configuration parameters to complete the pressure relief operation of the current round of pressure relief reaming.

[0159] Among them, the first configuration parameters include rotational speed, torque, thrust, and propulsion speed.

[0160] It should be noted that, as Figure 4 shown, in the present disclosure, the drill bit of the drilling rig is controlled to reciprocate within the drill hole to perform high-pressure water impact on the hole wall of the drill hole to obtain the hole wall 2 of the drill hole after hydraulic reaming. The moving speed of the drill bit should be appropriate and consistent, avoiding moving too fast or too slow, so as to ensure that the operation time for hydraulic reaming at each position during each individual forward (or return) journey operation process is consistent.

[0161] Step c6, assign the first discharge speed to the second discharge speed of the coal powder during the pressure relief operation of the current round of pressure relief reaming, and return to execute step c2 until the length of the drilling depth interval is less than or equal to a preset fourth threshold.

[0162] It can be understood that since each supplementary reaming is performed by a one-way reaming pressure relief operation according to fixed first configuration parameters, therefore, only performing one supplementary reaming may not be able to complete sufficient pressure relief. Steps c2 to c6 can be cyclically executed until the length of the drilling depth interval is less than or equal to a preset fourth threshold, that is, until the coal powder discharge speed at different hole depth positions in the drill hole no longer fluctuates significantly, and then stop supplementary reaming.

[0163] As Figure 6 shown, since a certain pressure relief effect has been produced by this hydraulic reaming, the next hydraulic reaming area 5 is usually smaller than the current hydraulic reaming area 4.

[0164] For example, as Figure 3 and Figure 7 shown, the static load accumulation index at the position of the stable value of the static load accumulation index is HSLA C = 0.4, and the pulverized coal weight AD C = 10 Kg; the static load accumulation index at the position of 6.2 m of the borehole depth in the high static load accumulation area 3 is 1, then the borehole diameter adaptive adjustment coefficient A 6.2 = 1 / 0.4 = 2.5; then it is determined that the time for carrying out hydraulic reaming at this position should make the pulverized coal weight AD generated by the hydraulic reaming at this position 6.2= 10 * 2.5 = 25 Kg; then repeat the above steps for other positions in the high static load accumulation area 3 in the hole. After the first hydraulic reaming construction is completed, the hole wall 6 after the first hydraulic reaming is obtained. Then, check whether there is a missed high static load accumulation area according to the pulverized coal discharge speed, and perform secondary hydraulic reaming on it to obtain the hole wall 7 after the secondary hydraulic reaming. The secondary hydraulic reaming area is the area with a hole depth of 1.8 - 17.2 m. During the reaming period, it is monitored and calculated that the pulverized coal discharge speed and derivative in the area with a hole depth of 4 - 12.4 m are greater than 0. This area is the third hydraulic reaming area 8, and the third hydraulic reaming is carried out on this area to obtain the hole wall 8 after the third hydraulic reaming; repeat the above steps until the pulverized coal discharge speed tends to a stable value, and the construction of the borehole diameter adaptive adjustment is completed.

[0165] The coal seam adaptive reaming pressure relief method based on high static load identification proposed according to the embodiments of the present disclosure includes obtaining multiple monitoring index data related to the static load accumulation degree at each hole depth position in the initial borehole in the coal seam; using the multiple monitoring index data corresponding to each hole depth position to calculate the static load accumulation index of the coal seam at each hole depth position; using the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index and the weight of the pulverized coal generated at the hole depth position corresponding to the stable value, obtaining the first pulverized coal weight; selecting a high static load accumulation area from the initial borehole according to the stable value and the static load accumulation index corresponding to each hole depth position; for each target hole depth position in the high static load accumulation area, determining the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, stable value and the first pulverized coal weight corresponding to the target hole depth position; performing a reaming pressure relief operation at the target hole depth position until the second pulverized coal weight generated by reaming at the target hole depth position is equal to the target pulverized coal weight, so as to complete the adaptive reaming pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing reaming operations according to the static load accumulation degree at different hole depth positions in the coal seam, making the borehole diameter adaptively match the impact hazard, and further ensuring that the high static loads at different depth positions in the coal seam can be fully released, effectively improving the borehole pressure relief effect and the prevention and control effect of rock burst disasters.

[0166] Figure 8 is a block diagram of a coal seam adaptive reaming pressure relief device shown according to an exemplary embodiment. Referring to Figure 8 FIG. 6, the device includes an acquisition unit 801, a calculation unit 802, a determination unit 803, a selection unit 804 and a pressure relief unit 805, wherein the pressure relief unit 805 includes a determination subunit 8051 and a reaming subunit 8052.

[0167] Among them, the acquisition unit 801 is configured to acquire multiple monitoring index data related to the static load accumulation degree at each hole depth position in the initial borehole in the coal seam;

[0168] The calculation unit 802 is configured to, for each hole depth position, use the multiple monitoring index data corresponding to the hole depth position to calculate the static load accumulation index of the coal seam at the hole depth position;

[0169] The determination unit 803 is configured to use the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index and the weight of the pulverized coal corresponding to the stable value, obtaining the first pulverized coal weight; the pulverized coal weight is the weight of the pulverized coal generated by drilling at the corresponding hole depth position in the initial borehole;

[0170] The selection unit 804 is configured to select a high static load accumulation area from the initial borehole according to the stable value and the static load accumulation index corresponding to each borehole depth position.

[0171] The pressure relief unit 805 is configured to perform the following steps in sequence for each target borehole depth position in the high static load accumulation area, so as to complete the adaptive reaming pressure relief at different target borehole depth positions in the initial borehole:

[0172] The determination subunit 8051 is configured to determine the target pulverized coal weight corresponding to the target borehole depth position according to the static load accumulation index, the stable value, and the first pulverized coal weight corresponding to the target borehole depth position; the target pulverized coal weight is the weight of the pulverized coal that needs to be discharged to adjust the static load accumulation index of the target borehole depth position to the stable value.

[0173] The reaming subunit 8052 is configured to perform a reaming pressure relief operation at the target borehole depth position until the second pulverized coal weight corresponding to the target borehole depth position is equal to the target pulverized coal weight.

[0174] In some embodiments of the present application, the reaming subunit 8052 may specifically be configured to:

[0175] Determine the occupancy ratio of the static load accumulation index corresponding to the target borehole depth position in the stable value, and obtain the aperture adaptive adjustment coefficient of the target borehole depth position;

[0176] Calculate the product of the aperture adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight of the target borehole depth position.

[0177] In some embodiments of the present application, the determination unit 803 may specifically be configured to:

[0178] Generate a first distribution curve of the static load accumulation index and the borehole depth by using the static load accumulation index corresponding to each borehole depth position;

[0179] Perform non-linear fitting on the first distribution curve to obtain the fitted first distribution curve;

[0180] Perform a first derivative on the fitted first distribution curve to obtain the first derivative result;

[0181] According to the first derivative result, select the static load accumulation index corresponding to the target position where the derivative is 0 in the fitted first distribution curve as the stable value; wherein, the static load accumulation index corresponding to the target position is not the peak of the static load index.

[0182] In some embodiments of the present application, the calculation unit 802 may specifically be configured to:

[0183] For each piece of monitoring index data among the multiple pieces of monitoring index data corresponding to the hole depth position, calculate the correlation index value between the monitoring index data and the other monitoring index data except the monitoring index data among the multiple pieces of monitoring index data;

[0184] For each piece of monitoring index data, calculate the volatility index value of the monitoring index data based on the multiple pieces of monitoring index data;

[0185] For each piece of monitoring index data, calculate the product of the correlation index value and the volatility index value of the monitoring index data to obtain the information amount of the monitoring index data;

[0186] Based on the information amount of each piece of monitoring index data, calculate the weight value corresponding to each piece of monitoring index data;

[0187] Perform weighted summation on the multiple pieces of monitoring index data according to the weight value corresponding to each piece of monitoring index data to obtain the static load accumulation index of the coal seam at the hole depth position.

[0188] In some embodiments of the present application, the reaming sub-unit 8052 can specifically be further configured to:

[0189] Compare the hole diameter adaptive adjustment coefficient with a preset second threshold to obtain a comparison result;

[0190] In the case where the comparison result is that the hole diameter adaptive adjustment coefficient is greater than or equal to the second threshold, perform the step of calculating the product of the hole diameter adaptive adjustment coefficient and the first pulverized coal weight to obtain the target pulverized coal weight at the target hole depth position.

[0191] In some embodiments of the present application, the device may further include a supplementary reaming unit, and the supplementary reaming unit is specifically configured to:

[0192] For each hole depth position, obtain the first discharge speed of the pulverized coal during the reaming pressure relief operation;

[0193] According to each hole depth position and the corresponding first discharge speed, generate a second distribution curve of the first discharge speed and the hole depth position;

[0194] Determine the target drilling depth interval according to the second distribution curve;

[0195] Within the drilling depth interval, control the drill bit of the drilling rig to perform a one-way reaming pressure relief operation according to the first configuration parameters to complete the current round of pressure relief reaming operation; the first configuration parameters include rotational speed, torque, thrust, and advance speed;

[0196] Assign the first discharge rate as the second discharge rate of pulverized coal during the reaming pressure relief operation in the current round, and return to execute the step of generating the second distribution curve of the first discharge rate and the hole depth position according to each hole depth position and its corresponding first discharge rate until the length of the drilling depth interval is less than or equal to a preset fourth threshold value.

[0197] In some embodiments of the present application, the supplementary reaming unit is specifically further configured to:

[0198] Perform a first derivative on the second distribution curve to obtain a second derivative result;

[0199] Select, according to the second derivative result, the drilling depth interval corresponding to the region where the derivative in the second distribution curve is greater than a preset third threshold value.

[0200] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0201] According to the coal seam adaptive reaming pressure relief device based on high static load identification proposed in the embodiments of the present disclosure, by obtaining multiple monitoring index data related to the static load accumulation degree at each hole depth position of the initial borehole in the coal seam; using the multiple monitoring index data corresponding to each hole depth position to calculate the static load accumulation index of the coal seam at each hole depth position; using the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index and the weight of pulverized coal generated at the hole depth position corresponding to the stable value to obtain the first pulverized coal weight; according to the stable value and the static load accumulation index corresponding to each hole depth position, select the high static load accumulation region from the initial borehole; for each target hole depth position in the high static load accumulation region, determine the target pulverized coal weight corresponding to the target hole depth position according to the static load accumulation index, stable value, and first pulverized coal weight corresponding to the target hole depth position; perform a reaming pressure relief operation at the target hole depth position until the second pulverized coal weight generated by reaming at the target hole depth position is equal to the target pulverized coal weight to complete the adaptive reaming pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing the reaming operation according to the static load accumulation degree at different hole depth positions in the coal seam, enabling the borehole diameter to be adaptively matched with the impact hazard, and further ensuring that the high static loads at different depth positions in the coal seam can be fully released, effectively improving the borehole pressure relief effect and the prevention and control effect of rock burst disasters

[0202] Figure 9It is a block diagram of an apparatus for a coal seam adaptive reaming pressure relief method based on high static load identification shown according to an exemplary embodiment. For example, the apparatus 900 may be an electronic device, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0203] Referring to Figure 9 , the apparatus 900 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an input / output (I / O) interface 912, a sensor component 914, and a communication component 916.

[0204] The processing component 902 generally controls the overall operation of the apparatus 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to complete all or part of the steps of the above-described method. In addition, the processing component 902 may include one or more modules to facilitate the interaction between the processing component 902 and other components. For example, the processing component 902 may include a multimedia module to facilitate the interaction between the multimedia component 908 and the processing component 902.

[0205] The memory 904 is configured to store various types of data to support the operation of the device 900. Examples of such data include instructions for any application or method operating on the apparatus 900, contact data, phone book data, messages, pictures, videos, etc. The memory 904 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0206] The power component 906 provides power to the various components of the apparatus 900. The power component 906 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the apparatus 900.

[0207] The multimedia component 908 includes a screen that provides an output interface between the device 900 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions, but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 908 includes a front camera and / or a rear camera. When the device 900 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0208] The audio component 910 is configured to output and / or input audio signals. For example, the audio component 910 includes a microphone (MIC) that is configured to receive external audio signals when the device 900 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 further includes a speaker for outputting audio signals.

[0209] The I / O interface 912 provides an interface between the processing component 902 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power button, and a lock button.

[0210] The sensor component 914 includes one or more sensors for providing a status assessment of various aspects of the device 900. For example, the sensor component 914 can detect the on / off state of the device 900, the relative positioning of components, such as the display and the keypad of the device 900. The sensor component 914 can also detect a change in the position of the device 900 or a component of the device 900, the presence or absence of user contact with the device 900, the orientation or acceleration / deceleration of the device 900, and the temperature change of the device 900. The sensor component 914 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 914 can also include a light sensor, such as a CMOS or a CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 914 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0211] The communication component 916 is configured to facilitate communication, either wired or wirelessly, between the device 900 and other devices. The device 900 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0212] In an exemplary embodiment, the device 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described method.

[0213] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 904 including instructions, is also provided. The above instructions may be executed by the processor 920 of the device 900 to complete the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, among others.

[0214] In an exemplary embodiment, a computer program product including a computer program is also provided. The computer program, when executed by the processor 920 of the device 900, implements the above-described method.

[0215] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include known common knowledge or conventional technical means in the technical field not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are pointed out by the following claims.

[0216] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes may be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A coal seam adaptive hole expansion and pressure relief method based on high static load identification, characterized in that: include: Acquire multiple monitoring index data related to the degree of static load accumulation at each hole depth of the initial borehole in the coal seam; For each hole depth position, using a plurality of monitoring index data corresponding to the hole depth position, calculate the static load accumulation index of the coal seam at the hole depth position; Using the static load accumulation index corresponding to each hole depth position, a stable value of the static load accumulation index is determined, and the weight of the coal powder generated at the hole depth position corresponding to the stable value is determined to obtain a first coal powder weight; the coal powder weight is the weight of the coal powder generated by drilling at the corresponding hole depth position in the initial borehole; Selecting a high static load accumulation area from the initial drilling hole according to the stability value and the static load accumulation index corresponding to each hole depth position; For each target hole depth position in the high static load accumulation area, the following steps are performed in sequence to complete the adaptive hole expansion and pressure relief at different target hole depth positions in the initial drilling: Determining a target coal powder weight corresponding to the target hole depth position according to the static load accumulation index corresponding to the target hole depth position, the stability value and the first coal powder weight; Performing an adaptive hole enlarging and pressure relief operation at the target hole depth position until the weight of the second coal powder generated by the hole enlarging at the target hole depth position is equal to the target coal powder weight; The method of calculating the static load accumulation index of the coal seam at the hole depth position by using a plurality of monitoring index data corresponding to the hole depth position includes: For each monitoring indicator data in the multiple monitoring indicator data corresponding to the hole depth position, a correlation index value between the monitoring indicator data and other monitoring indicator data in the multiple monitoring indicator data except the monitoring indicator data is calculated, and the correlation index value is calculated using the following formula: In the formula, is the correlation index value between the ith index and other indexes, is the absolute value of the correlation coefficient between the i-th indicator and the j-th indicator; For each monitoring indicator data, the volatility index value of the monitoring indicator data is calculated based on the multiple monitoring indicator data, and the volatility index value is calculated using the following formula: : is the data average of the i-th indicator, is the mth monitoring indicator data; For each monitoring indicator data, the product of the correlation index value and the volatility index value of the monitoring indicator data is calculated to obtain the information amount of the monitoring indicator data; Based on the amount of information of each monitoring indicator data, calculate the weight value corresponding to each monitoring indicator data; The plurality of monitoring indicator data are weighted and summed according to the weight value corresponding to each monitoring indicator data to obtain the static load accumulation index of the coal seam at the hole depth position.

2. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 1 is characterized in that: The step of determining the target coal powder weight corresponding to the target hole depth position according to the static load accumulation index corresponding to the target hole depth position, the stability value and the first coal powder weight comprises: Determine the proportion of the static load accumulation index corresponding to the target hole depth position in the stable value, and obtain the hole diameter adaptive adjustment coefficient of the target hole depth position; The product of the aperture adaptive adjustment coefficient and the first coal powder weight is calculated to obtain the target coal powder weight at the target hole depth position.

3. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 1, characterized in that: The method of determining the stable value of the static load accumulation index by using the static load accumulation index corresponding to each hole depth position includes: Using the static load accumulation index corresponding to each hole depth position, a first distribution curve of the static load accumulation index and the drilling depth is generated; Performing nonlinear fitting on the first distribution curve to obtain a fitted first distribution curve; Performing a derivation on the fitted first distribution curve to obtain a first derivation result; According to the first derivative result, the static load accumulation index corresponding to the target position whose derivative in the fitted first distribution curve is less than or equal to the first threshold is selected as the stable value; wherein the static load accumulation index corresponding to the target position is a non-static load index peak value.

4. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 2, characterized in that: After determining the proportion of the static load accumulation index corresponding to the target hole depth position in the stable value and obtaining the hole diameter adaptive adjustment coefficient of the target hole depth position, the method further includes: Comparing the aperture adaptive adjustment coefficient with a preset second threshold to obtain a comparison result; When the comparison result is that the aperture adaptive adjustment coefficient is greater than or equal to the second threshold, the step of calculating the product of the aperture adaptive adjustment coefficient and the first coal powder weight to obtain the target coal powder weight at the target hole depth position is performed.

5. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 1, characterized in that: After the self-adaptive hole expansion and pressure relief at different target hole depth positions in the initial borehole are completed, the method further includes: For each hole depth position, obtaining a first discharge velocity of coal powder during the hole expansion and pressure relief operation; According to each hole depth position and the first discharge speed corresponding to each hole depth position, a second distribution curve of the first discharge speed and the hole depth position is generated; determining a target drilling depth interval according to the second distribution curve; In the drilling depth range, the drill bit of the drilling rig is controlled to perform a one-way hole expansion and pressure relief operation according to first configuration parameters to complete the current round of pressure relief, hole expansion and pressure relief operations; the first configuration parameters include rotation speed, torque, propulsion force and propulsion speed; The first discharge speed is assigned as the second discharge speed of the coal powder during the current round of hole expansion and pressure relief operation, and the step of generating a second distribution curve of the first discharge speed and the hole depth position according to each hole depth position and the first discharge speed corresponding to each of the hole depth positions is returned to execute until the length of the drilling depth interval is less than or equal to the preset fourth threshold value.

6. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 5, characterized in that: The determining a target drilling depth interval according to the second distribution curve comprises: Deriving the second distribution curve once to obtain a second derivative result; A drilling depth interval corresponding to a region where the derivative is greater than a preset third threshold value is selected from the second distribution curve according to the second derivative result.

7. A coal seam adaptive hole expansion and pressure relief device based on high static load identification, using the above-mentioned coal seam adaptive hole expansion and pressure relief method based on high static load identification, characterized in that: include: An acquisition unit is used to acquire a plurality of monitoring index data related to the degree of static load accumulation at each hole depth of an initial borehole in a coal seam; A calculation unit, for calculating, for each hole depth position, a static load accumulation index of the coal seam at the hole depth position using a plurality of monitoring index data corresponding to the hole depth position; a determination unit, for determining a stable value of the static load accumulation index by using the static load accumulation index corresponding to each hole depth position, and determining the weight of the coal powder generated at the hole depth position corresponding to the stable value, to obtain a first coal powder weight; the coal powder weight is the weight of the coal powder generated by drilling at the corresponding hole depth position in the initial borehole; A selection unit, configured to select a high static load accumulation area from the initial drilling hole according to the stability value and the static load accumulation index corresponding to each hole depth position; The pressure relief unit is used to perform the following steps in sequence for each target hole depth position in the high static load accumulation area to complete the adaptive hole expansion pressure relief at different target hole depth positions in the initial drilling: a determination subunit, configured to determine a target coal powder weight corresponding to the target hole depth position according to the static load accumulation index corresponding to the target hole depth position, the stability value and the first coal powder weight; The hole enlarging subunit is used to perform hole enlarging and pressure relief operation at the target hole depth position until the weight of the second coal powder generated by the hole enlarging at the target hole depth position is equal to the target coal powder weight; The method of calculating the static load accumulation index of the coal seam at the hole depth position by using a plurality of monitoring index data corresponding to the hole depth position includes: For each monitoring indicator data in the multiple monitoring indicator data corresponding to the hole depth position, a correlation index value between the monitoring indicator data and other monitoring indicator data in the multiple monitoring indicator data except the monitoring indicator data is calculated, and the correlation index value is calculated using the following formula: In the formula, is the correlation index value between the ith index and other indexes, is the absolute value of the correlation coefficient between the i-th indicator and the j-th indicator; For each monitoring indicator data, the volatility index value of the monitoring indicator data is calculated based on the multiple monitoring indicator data, and the volatility index value is calculated using the following formula: : is the data average of the i-th indicator, is the mth monitoring indicator data; For each monitoring indicator data, the product of the correlation index value and the volatility index value of the monitoring indicator data is calculated to obtain the information amount of the monitoring indicator data; Based on the amount of information of each monitoring indicator data, calculate the weight value corresponding to each monitoring indicator data; The plurality of monitoring indicator data are weighted and summed according to the weight value corresponding to each monitoring indicator data to obtain the static load accumulation index of the coal seam at the hole depth position.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

10. A computer program product, comprising a computer program, characterized in that The computer program implements the method according to any one of claims 1 to 5 when executed by a processor.

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