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

Abstract

The invention relates to a coal seam self-adaptive reaming pressure relief method and device based on high static load identification, and the method comprises the steps: obtaining a plurality of pieces of monitoring index data of an initial drill hole in a coal seam at each hole depth position; determining a static load accumulation index distribution change condition by using a plurality of pieces of monitoring index data corresponding to each hole depth position; determining a stable value of a static load accumulation index and a first pulverized coal weight corresponding to the stable value; selecting a high static load accumulation area according to the stable value and the static load accumulation index distribution change condition; aiming at each target hole depth position in the high static load accumulation area, determining a target pulverized coal weight corresponding to the target hole depth position; and performing reaming and 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. According to the scheme, it can be ensured that 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 in particular to a method and device for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification. Background Art

[0002] Rock burst is one of the main dynamic hazards faced by coal mining. Hard coal seams will accumulate a large amount of elastic energy under high static loads, and are very likely to induce rock burst under high-intensity mining disturbances.

[0003] At present, 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 load accumulated in the coal seam, and the high static load accumulation area of ​​the side of the coal seam is transferred to the deep part of the coal seam, thereby reducing the risk of rock burst disasters. Studies have shown that the borehole diameter is closely related to the pressure relief capacity. The larger the borehole diameter, the higher the degree of static load release. However, during the current drilling construction, the borehole diameter is fixed and unchanged, 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 accuracy and efficiency in the management of rock burst disasters. Summary of the invention

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

[0005] According to a first aspect of an embodiment of the present disclosure, a method for self-adaptive hole expansion and pressure relief in a coal seam based on high static load identification is provided, comprising: 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 the drilling operation 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; The hole enlarging and pressure relief operation is performed at the target hole depth until the weight of the second coal powder generated by the hole enlarging at the target hole depth is equal to the target coal powder weight.

[0006] In the embodiment of the present application, 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 includes: 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.

[0007] In the embodiment of the present application, 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.

[0008] In the embodiment 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 includes: For each monitoring indicator data among the plurality of monitoring indicator data corresponding to the hole depth position, calculating a correlation index value between the monitoring indicator data and other monitoring indicator data among the plurality of monitoring indicator data except the monitoring indicator data; For each monitoring indicator data, calculating a volatility indicator value of the monitoring indicator data based on the plurality of 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.

[0009] In an embodiment of the present application, after determining the proportion of the static load accumulation index corresponding to the target hole depth position in the stable value and obtaining the aperture 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.

[0010] In the embodiment of the present application, after the self-adaptive hole expansion and pressure relief at different target hole depth positions in the initial drilling 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.

[0011] In an embodiment of the present application, determining a target drilling depth interval according to the second distribution curve includes: 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.

[0012] According to a second aspect of an embodiment of the present disclosure, a coal seam adaptive hole expansion and pressure relief device based on high static load identification is provided, comprising: 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.

[0013] According to a third aspect of an embodiment of the present disclosure, an electronic device includes: 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 described in any one of the first aspects is implemented.

[0014] According to a fourth aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method according to any one of the first aspects is implemented.

[0015] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, comprising a computer program, wherein the computer program implements the method as described in any one of the first aspects when executed by a processor.

[0016] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by obtaining multiple monitoring index data related to the degree of static load accumulation 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, calculating 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, determining the stable value of the static load accumulation index, and determining the weight of coal powder generated at the hole depth position corresponding to the stable value, to obtain the first coal powder 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 in the high static load accumulation area, Position, determine the target coal powder weight corresponding to the target hole depth position according to the static load accumulation index, stability value and the first coal powder weight corresponding to the target hole depth position; perform hole expansion and pressure relief operation at the target hole depth position until the second coal powder weight generated by hole expansion at the target hole depth position is equal to the target coal powder weight, so as to complete the adaptive hole expansion and pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing hole expansion operation according to the static load accumulation degree at different hole depth positions in the coal seam, so that the borehole diameter is adaptively matched with the impact hazard, and then it can ensure that the high static loads at different depth positions in the coal seam can be fully released, which effectively improves the drilling pressure relief efficacy and the impact ground pressure disaster prevention and control effect.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 The present invention is a flow chart showing a method for adaptively expanding and decompressing a coal seam based on high static load identification according to an exemplary embodiment.

[0020] Figure 2 It is a schematic diagram of the first distribution curve proposed in the embodiment of the present disclosure.

[0021] Figure 3 It is a schematic diagram of the stable value and high static load accumulation area proposed in the embodiment of the present disclosure.

[0022] Figure 4 It is a schematic diagram of the drill bit reciprocating in the borehole to expand the hole proposed in the embodiment of the present disclosure.

[0023] Figure 5 It is a schematic diagram of the second distribution curve proposed in the embodiment of the present disclosure.

[0024] Figure 6It is a schematic diagram comparing the hole expansion area of ​​this time and the hole expansion area of ​​the next time proposed in the embodiment of the present disclosure.

[0025] Figure 7 It is a schematic diagram of the process of adaptively adjusting the drilling aperture proposed in the embodiment of the present disclosure.

[0026] Figure 8 It is a block diagram of a coal seam adaptive hole expansion and pressure relief device based on high static load identification according to an exemplary embodiment.

[0027] Fig. 9 It is a block diagram of a device for a method for adaptively expanding and decompressing a coal seam based on high static load identification according to an exemplary embodiment.

[0028] Reference numerals 1-initial drilling; 2-borehole wall after hole expansion; 3-high static load accumulation area; 4-this hydraulic hole expansion area; 5-next hydraulic hole expansion area; 6-hole wall after first hole expansion; 7-hole wall after second hole expansion; 8-hole wall after third hydraulic hole expansion. DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the 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. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0030] The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments, and are not intended to limit the disclosed embodiments. The singular forms "a", "an" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0031] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the disclosed embodiments, these 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 disclosed embodiments, 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 "if" as used herein may be interpreted as "at" or "when" or "in response to determination".

[0032] In addition, various forms of processes shown in the embodiments of the present disclosure may be used to reorder, add or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present disclosure can be achieved, and this document does not limit this.

[0033] Rock burst is one of the main dynamic hazards faced by coal mining. Hard coal seams will accumulate a large amount of elastic energy under high static loads, and are very likely to induce rock burst under high-intensity mining disturbances.

[0034] At present, 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 load accumulated in the coal seam, and the high static load accumulation area of ​​the side of the coal seam is transferred to the deep part of the coal seam, thereby reducing the risk of rock burst disasters. Studies have shown that the borehole diameter is closely related to the pressure relief capacity. The larger the borehole diameter, the higher the degree of static load release. However, during the current drilling construction, the borehole diameter is fixed and unchanged, 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 accuracy and efficiency in the management of rock burst disasters.

[0035] In addition, the following problems still exist in the current drilling: the hole spacing of the drilling is usually 100~300mm, the construction workload is large, and the economic burden is heavy; the pressure relief drilling is time-sensitive, and as time goes by, the drilling hole gradually closes and loses its 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 rock burst prevention and control effect is limited.

[0036] In order to solve the above problems, the present disclosure provides a method and device for adaptive hole expansion and pressure relief in coal seams based on high static load identification, which obtains multiple monitoring index data related to the degree of static load accumulation at each hole depth position of the initial borehole in the coal seam; uses 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; uses the static load accumulation index corresponding to each hole depth position to determine the stable value of the static load accumulation index, and determines the weight of coal powder generated at the hole depth position corresponding to the stable value, so as to obtain the first coal powder weight; selects 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; and for the high static load accumulation area For each target hole depth position in the borehole, the target coal powder weight corresponding to the target hole depth position is determined according to the static load accumulation index, stability value and first coal powder weight corresponding to the target hole depth position; the hole expansion and pressure relief operation is performed at the target hole depth position until the second coal powder weight generated by the hole expansion at the target hole depth position is equal to the target coal powder weight, so as to complete the adaptive hole expansion and pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing the hole expansion operation according to the static load accumulation degree at different hole depth positions in the coal seam, so that the borehole diameter is adaptively matched with the impact hazard, thereby ensuring that the high static loads at different depth positions in the coal seam can be fully released, effectively improving the drilling pressure relief efficacy and the impact ground pressure disaster prevention and control effect.

[0037] Figure 1 is a flow chart of a method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to an exemplary embodiment. Figure 1 As shown, it should be noted that the method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification in the embodiment of the present disclosure is applied to a self-adaptive hole expansion and pressure relief device in coal seams based on high static load identification. Figure 1 As shown, the method may include the following steps: Step 101 : obtaining 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.

[0038] It should be noted that before the hole is expanded, it is necessary to first drill a hole in the coal seam according to a preset size to obtain the above-mentioned initial borehole.

[0039] In one embodiment, the above-mentioned multiple monitoring indicator data may include any multiple of the following indicators: coal powder weight (unit Kg / m), rotation speed (unit r / min), torque (N•m), propulsion force (N), propulsion speed (unit m / s).

[0040] As an example, the drilling parameter sensor group may include any of the following: a coal powder sensor for monitoring coal powder weight, a speed sensor for monitoring drill bit speed, a torque sensor for monitoring drill bit output torque, a propulsion force sensor for monitoring drill bit propulsion force, and a propulsion speed sensor for monitoring drill bit propulsion speed.

[0041] In a possible implementation, during the data collection process, data information of each interval is obtained. Taking a borehole with a depth of 20m as an example, the above index data obtained by monitoring every 0.5m of the borehole depth is averaged to obtain a data set, and 40 data sets are obtained for each borehole.

[0042] In some embodiments of the present application, before step 102, the monitoring index data may be dimensionalized, that is, the data may be converted into a dimensionless form to eliminate the influence of different dimensions on data analysis. The dimensionalization may be performed by the following steps using a normalization method: Formula 1:

[0043] Or, Formula 2:

[0044] in, It represents the value of the indicator after dimensionless processing. It represents the value of the indicator before dimensionless processing. Indicates the index in the dataset. data, Indicates the minimum value of the indicator. Indicates the maximum value of this indicator.

[0045] The specific formula ① or formula can be used to dimensionalize the monitoring index data according to the positive or negative correlation between different monitoring index data and the degree of static load accumulation: Regarding the weight of coal powder, since the weight of coal powder reflects the intensity of coal body crushing and energy release during the drilling process. In the area with high static load accumulation, the coal body is in a high stress state. After drilling, the cracks in the surrounding coal body expand more violently, the crushing range increases, and the weight of discharged coal powder increases significantly. Therefore, the monitoring indicator data adopts formula 1; Regarding the rotation speed and torque, the rotation resistance torque of the borehole increases due to the high pressure in the concentrated area of ​​the static load of the coal seam. Studies have shown that when the borehole confining pressure increases from 10kPa to 40kPa, the rotation resistance torque of the casing drill can increase by more than 4 times. In order to avoid overloading the drilling rig, the rotation speed needs to be reduced and the torque needs to be increased. Therefore, the speed parameter uses formula 2 and the torque parameter uses formula 1; 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, the thrust force needs to be increased to ensure the drilling efficiency when drilling in the high static load area of ​​the coal body. Therefore, the monitoring index data adopts formula 1; As for the advancement speed, since the advancement speed affects the coal powder discharge efficiency and drilling stability, the coal seam is hard in the high static load area of ​​the coal seam, and the drilling speed is reduced to ensure the drilling effect. Therefore, the monitoring indicator data adopts formula 2.

[0046] Step 102, 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.

[0047] In one embodiment, the static load accumulation index can reflect the degree of static load accumulation at a certain hole depth, and can be calculated based on any multiple indicators of coal powder weight, rotation speed, torque, propulsion force, and propulsion speed.

[0048] In some embodiments of the present application, the method of 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 proposed in step 102 may specifically include the following steps: Step a1: for each monitoring indicator data among a plurality of monitoring indicator data corresponding to the hole depth position, calculate a correlation index value between the monitoring indicator data and other monitoring indicator data among the plurality of monitoring indicator data except the monitoring indicator data.

[0049] In one embodiment, the correlation index value may be calculated using the following formula:

[0050] 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.

[0051]

[0052] In the formula, is the correlation coefficient between the ith indicator and the jth indicator, n is the amount of indicator data, m is the mth data in the indicator data set, is the data average of the i-th indicator, is the data average of the jth indicator.

[0053] Step a2: for each monitoring indicator data, a volatility indicator value of the monitoring indicator data is calculated based on multiple monitoring indicator data.

[0054] In one embodiment, the volatility index value can be calculated using the following formula: : .

[0055] Step a3: 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 content of the monitoring indicator data.

[0056] In one embodiment, the information content of the monitoring indicator data can be calculated using the following formula: : .

[0057] Step a4: Calculate the weight value corresponding to each monitoring indicator data based on the amount of information of each monitoring indicator data.

[0058] In one embodiment, the weight value corresponding to the i-th monitoring indicator data can be calculated using the following formula: :

[0059] Among them, i=1, 2, 3, 4, 5, that is, the information amount of each of the five monitoring indicator data is summed up to obtain the sum value, and the information amount of the i-th monitoring indicator data is determined The percentage in the above sum.

[0060] Step a5: weighted summing is performed on multiple monitoring indicator data 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.

[0061] In one embodiment, the static load accumulation index SLAI may be calculated using the following formula:

[0062] In the formula, is the dimensionalized value of the i-th monitoring indicator data.

[0063] In the embodiment of the present application, the degree of static load accumulation at each hole depth in the borehole is comprehensively evaluated from the two aspects of the correlation and stability of the indicator monitoring indicator data, thereby improving the rationality and accuracy of the evaluation result, and then being able to determine the degree of hole expansion at each hole depth, so that the borehole diameter and the degree of static load accumulation are adaptively matched, ensuring that the high static loads at different depths of the borehole can be fully released, thereby effectively improving the borehole pressure relief effect and the impact ground pressure disaster prevention and control effect.

[0064] 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 determine the weight of the coal powder generated at the hole depth position corresponding to the stable value, to obtain the first coal powder weight.

[0065] The weight of the coal powder is the weight of the coal powder generated by the drilling operation at the corresponding hole depth in the initial borehole.

[0066] It can be understood that at different depths from the hole mouth to the bottom of the borehole, the accumulation degree of the static load shows a trend of first increasing, then decreasing and then maintaining stability, while in the static load stable area, the static load has no obvious change and maintains a relatively stable state. Therefore, based on the numerical distribution changes 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 a stable state can be selected as the stable value, that is, the value of the static load accumulation index in a non-fluctuating state can be selected as the stable value.

[0067] In some embodiments of the present application, 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 proposed in step 103 may specifically include the following steps: 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; Perform 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 position where the derivative of the fitted first distribution curve is less than or equal to the first threshold is selected as the stable value. The static load accumulation index corresponding to the target position is not the peak value of the static load index.

[0068] It should be noted that the first threshold is equal to 0 or close to 0. For example, the first threshold can be set to 0.5 or 1.

[0069] In one embodiment, the first distribution curve is as follows Figure 2 As shown in the figure, the horizontal axis is the drilling depth, the vertical axis is the static load accumulation index, and the static load accumulation index SLAI slowly increases from 0 to a peak value of 1, then gradually decreases and stabilizes at about 0.4. The stable value of the static load accumulation index can be accurately calculated by taking a derivative of the first distribution curve, that is, the drilling depth position where the static load accumulated in the coal seam is within a safe range and its corresponding static load accumulation index can be determined.

[0070] like Figure 3 As shown, according to the first distribution curve of the static load accumulation index and the drilling depth, the static load accumulation index stable value (for example Figure 3The value is 0.4. The mathematical calculation method is to perform nonlinear fitting on the curve, and then take the derivative of the curve obtained after nonlinear fitting. When the derivative is 0 or close to 0, that is, the static load accumulation index stability value is 0.4 at the drilling depth of 17.2m.

[0071] Step 104 : 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.

[0072] In one embodiment, the area with a higher static load stability value in the drilling depth interval of the initial drilling is a high static load accumulation area HSLA (eg Figure 3 The medium-high static load accumulation area 3 is the area with a drilling depth of 1.8 to 17.2 m). The larger the value of this indicator is, the larger the impact risk range of the high static load accumulation area is.

[0073] For each target hole depth position in the high static load accumulation area, the following steps 105-106 are performed in sequence to complete the adaptive hole expansion pressure relief at different target hole depth positions in the initial drilling: Step 105, determining a target coal powder weight corresponding to the target hole depth position according to the static load accumulation index, the stability value and the first coal powder weight corresponding to the target hole depth position.

[0074] It is understood that in order to achieve full 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 by expanding the hole. The static load accumulation degree is characterized by the static load accumulation index, and the stable value of the static load accumulation index represents that the static load accumulation degree is a low value. Therefore, there is a certain mapping relationship between the target coal powder weight that needs to be discharged corresponding to the static load accumulation index at the target hole depth position and the first coal powder weight generated at the static load accumulation index at the stable value hole depth position. According to this mapping relationship, the target coal powder weight that needs to be discharged by expanding the hole 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 coal powder weight.

[0075] Step 106, performing a hole expansion and pressure relief operation at the target hole depth position until the second coal powder weight corresponding to the target hole depth position is equal to the target coal powder weight.

[0076] In one embodiment, the above-mentioned hole expansion and pressure relief operation can be carried out by hydraulic hole expansion, that is, after the large-diameter drilling construction is completed, the hydraulic hole expansion device of the drill bit is turned on, and the drill rod connected to the drill bit is a double-layer high-pressure sealed drill rod, the inner layer of the drill rod 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 rod is a low-pressure waterway, which is connected to the water outlet at the outer end of the drill bit. After turning on the hydraulic hole expansion device, the drill rig is operated to control the drill bit to rotate and cut the coal body, and reciprocate in the hydraulic hole expansion area so that the coal powder can be discharged out of the hole in time. During the hydraulic hole expansion process, the water outlet at the front end of the drill bit sprays high-pressure water to cut the coal body and expand the diameter of the drill hole; the water outlet at the outer end of the drill bit sprays low-pressure water to discharge the coal powder generated by high-pressure water cutting.

[0077] As an example, in the process of using a drill bit to expand a hole to a certain target hole depth, the discharged coal powder (i.e., the second coal powder weight) can be continuously weighed. When the weight of the discharged second coal powder is equal to the target coal powder weight, it means that the expansion and pressure relief at the target hole depth has been completed.

[0078] In some embodiments of the present application, step 105 may specifically include the following steps: Step b1, determining the proportion of the static load accumulation index corresponding to the target hole depth position in the stable value, and obtaining the aperture adaptive adjustment coefficient of the target hole depth position; Step b2, 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.

[0079] It can be understood that the aperture adaptive adjustment coefficient can be used to accurately quantify the mapping relationship between the first coal powder weight and the target coal powder weight, so that the weight of coal powder that needs to be discharged at the target hole depth can be accurately calculated based on the first coal powder weight, thereby accurately controlling the degree of expansion of the drilling diameter and ultimately fully releasing the accumulated high static load.

[0080] In one embodiment, the aperture adaptive adjustment coefficient A can be calculated using the following formula: L : A L =HSLA L / HSLA C Among them, HSLA L is the static load accumulation index corresponding to the target hole depth, HSLA C is the stable value of the static load accumulation index.

[0081] In one embodiment, the target coal powder weight AD at the target hole depth position can be calculated using the following formula: L : AD L =A L *AD C Among them, AD C It is the first coal powder weight generated at the hole depth position corresponding to the stable value of the static load index.

[0082] In some embodiments of the present application, after step b1, the method may further include: 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 preset threshold, step b2 is executed.

[0083] It should be noted that the second threshold (ie, the aperture adaptive adjustment coefficient threshold) may be preset according to actual needs.

[0084] In one embodiment, the aperture adaptive adjustment coefficient A can be L With the second threshold TA L For comparison, in A L ≥TA L In the case of, 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, and the subsequent steps are executed to complete the hole expansion and pressure relief operation.

[0085] In another embodiment, in A L <TA L In this case, it indicates that the accumulation of static load is within an acceptable range, that is, within a safe range, and it is not necessary to perform hole expansion and pressure relief operations at the current hole depth position.

[0086] In some embodiments of the present application, after the large-diameter borehole hydraulic expansion construction is completed, the distribution of high static load accumulation at different depths in the borehole is changed, and the high static load is effectively released. Based on the conservative principle, in order to further verify whether there is a missed high static load accumulation area and perform supplementary hydraulic expansion, the supplementary hydraulic expansion area is accurately adjusted in real time according to the coal powder discharge speed ADSL index, so as to further fully relieve the high static load accumulated in the coal seam. After completing the adaptive expansion pressure relief at different target hole depths in the initial borehole, the method also includes: Step c1, for each hole depth position, obtaining a first discharge velocity of coal powder during the hole expansion and pressure relief operation.

[0087] It should be noted that, due to the cutting and destruction of the coal body by the water jet during the hydraulic expansion process, the coal body in the high static load area is more likely to break, and the crack expansion is accelerated, thereby releasing more coal powder. There is a positive correlation between the coal powder discharge rate and the degree of high static load accumulation, that is, the area with high coal powder discharge rate has a high degree of high static load accumulation. Therefore, when the coal powder discharge rates at different locations in the area are the same or similar, it indicates that the degree of static load accumulation in the area is the same or similar, that is, there is no obvious high static load accumulation area, indicating that the high static load in the area has been fully and completely released.

[0088] In one embodiment, the first discharge rate is the weight of coal powder discharged per unit time when hydraulic hole expansion is performed at different hole depth positions L. The first discharge rate ADSL of coal powder monitored and obtained in each individual outward (or return) operation process is a data set.

[0089] Step c2, 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 hole depth position.

[0090] Step c3, determining the target drilling depth interval according to the second distribution curve.

[0091] In one embodiment, the area in the borehole where high static load still exists can be determined based on the second distribution curve, so that further expansion can be performed on this area.

[0092] In some embodiments of the present application, step c3 may specifically include the following steps: Derivative 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.

[0093] It should be noted that the preset third threshold is 0 or a number close to 0, for example, the preset third threshold may be 1 or 0.5.

[0094] In one embodiment, Figure 5 As shown, according to the data set of coal powder discharge rate ADSL monitored and obtained in each single outward or return (i.e., the same round of hole expansion) operation process, a second distribution curve of coal powder discharge rate ADSL and drilling depth is established, and a derivative is taken to obtain the area LR1 where the derivative is greater than 0. The range corresponding to LR1 is the above-mentioned drilling depth interval, i.e., the area where hydraulic hole expansion should be supplemented in the next single outward or return operation process. Figure 5 It can be seen that the above-mentioned hydraulic expansion area is inside the high static load accumulation area 3.

[0095] Step c4, within the drilling depth range, 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, and complete the current round of pressure relief and hole expansion operation.

[0096] Among them, the first configuration parameters include rotation speed, torque, propulsion force and propulsion speed.

[0097] It should be noted that if Figure 4 As shown, the present invention controls the drill bit to move back and forth in the borehole through the drilling rig to perform high-pressure water impact on the borehole wall to obtain the borehole wall 2 after hydraulic hole expansion. The movement speed of the drill bit should be appropriate and consistent to avoid moving fast and slow, so as to ensure that the operation time of hydraulic hole expansion at each position in each separate outbound (or return) operation process is consistent.

[0098] Step c6, assigning the first discharge speed as the second discharge speed of the coal powder during the pressure relief process of the current round of pressure relief and hole expansion operation, and returning to execute step c2 until the length of the drilling depth interval is less than or equal to the preset fourth threshold.

[0099] It is understandable that since each supplementary hole expansion performs a unidirectional hole expansion pressure relief operation according to the fixed first configuration parameters, sufficient pressure relief may not be achieved by only performing supplementary hole expansion once. Steps c2 to c6 can be executed cyclically until the length of the drilling depth interval is less than or equal to the preset fourth threshold value, that is, until the coal powder discharge speed at different hole depths in the borehole no longer fluctuates significantly, the supplementary hole expansion is stopped.

[0100] like Figure 6 As shown, since the hydraulic hole expansion this time has produced a certain pressure relief effect, the area 5 of the next hydraulic hole expansion is usually smaller than the area 4 of the current hydraulic hole expansion.

[0101] For example, if Figure 3 and Figure 7 As shown in the figure, the static load accumulation index at the stable value of the static load accumulation index is HSLA C =0.4, coal powder weight AD C =10Kg; the static load accumulation index at the drilling depth of 6.2m in the high static load accumulation area 3 is 1, so the aperture adaptive adjustment coefficient A at this location 6.2 =1 / 0.4=2.5; then the hydraulic expansion time should be determined so that the coal powder weight AD generated by the hydraulic expansion is 6.2=10*2.5=25Kg; then repeat the above steps for other positions of the high static load accumulation area 3 in the hole, the first hydraulic hole expansion construction is completed, and the hole wall 6 after the first hydraulic hole expansion is obtained. Then check whether there is a missed high static load accumulation area according to the coal powder discharge rate, and perform a second hydraulic hole expansion on it to obtain the hole wall 7 after the second hydraulic hole expansion. The second hydraulic hole expansion area is the area with a hole depth of 1.8~17.2m. During the hole expansion, it is monitored and calculated to determine that the coal powder discharge rate and derivative in the area with a hole depth of 4~12.4m are greater than 0. This area is the third hydraulic hole expansion area 8. The third hydraulic hole expansion is performed on this area to obtain the hole wall 8 after the third hydraulic hole expansion; repeat the above steps until the coal powder discharge rate tends to a stable value, and the construction of the borehole aperture adaptive adjustment is completed.

[0102] According to the coal seam adaptive hole expansion and pressure relief method based on high static load identification proposed in the embodiment of the present disclosure, multiple monitoring index data related to the static load accumulation degree at each hole depth position of the initial borehole in the coal seam are obtained; the static load accumulation index of the coal seam at each hole depth position is calculated by using the multiple monitoring index data corresponding to each hole depth position; the stable value of the static load accumulation index is determined by using the static load accumulation index corresponding to each hole depth position, and the weight of the coal powder generated at the hole depth position corresponding to the stable value is determined to obtain the first coal powder weight; according to the stable value and the static load accumulation index corresponding to each hole depth position, a high static load accumulation area is selected from the initial borehole; for each target in the high static load accumulation area, The hole depth position is marked, and the target coal powder weight corresponding to the target hole depth position is determined according to the static load accumulation index, stability value and first coal powder weight corresponding to the target hole depth position; the hole expansion and pressure relief operation is performed at the target hole depth position until the second coal powder weight generated by the hole expansion at the target hole depth position is equal to the target coal powder weight, so as to complete the adaptive hole expansion and pressure relief at different target hole depth positions in the initial borehole, thereby achieving the purpose of adaptively performing the hole expansion operation according to the static load accumulation degree at different hole depth positions in the coal seam, so that the borehole diameter is adaptively matched with the impact hazard, thereby ensuring that the high static loads at different depth positions in the coal seam can be fully released, and effectively improving the drilling pressure relief efficacy and the impact ground pressure disaster prevention and control effect.

[0103] Figure 8 1 is a block diagram of a coal seam adaptive hole expansion and pressure relief device based on high static load identification according to an exemplary embodiment. Figure 8 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 hole expansion subunit 8052.

[0104] The acquisition unit 801 is used to acquire a plurality of monitoring index data related to the static load accumulation degree at each hole depth of the initial borehole in the coal seam; The calculation unit 802 is used to calculate the static load accumulation index of the coal seam at each hole depth position by using a plurality of monitoring index data corresponding to the hole depth position; The determination unit 803 is used to determine the stable value of the static load accumulation index and the coal powder weight corresponding to the stable value by using the static load accumulation index corresponding to each hole depth position, and 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 drilling hole; A selection unit 804 is used 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 805 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: The determination subunit 8051 is used to determine the target coal powder weight corresponding to the target hole depth position according to the static load accumulation index, the stability value and the first coal powder weight corresponding to the target hole depth position; the target coal powder weight is the coal powder weight required to be discharged to adjust the static load accumulation index at the target hole depth position to the stability value; The hole enlarging subunit 8052 is used to perform hole enlarging and pressure relief operations at a target hole depth position until the second coal powder weight corresponding to the target hole depth position is equal to the target coal powder weight.

[0105] In some embodiments of the present application, the hole expansion subunit 8052 can be specifically used for: 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 at 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.

[0106] In some embodiments of the present application, the determining unit 803 may be specifically configured to: 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; Perform 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 is 0 in the fitted first distribution curve is selected as the stable value; wherein the static load accumulation index corresponding to the target position is the non-static load index peak value.

[0107] In some embodiments of the present application, the calculation unit 802 may be specifically used for: For each monitoring indicator data in the plurality of monitoring indicator data corresponding to the hole depth position, calculating a correlation index value between the monitoring indicator data and other monitoring indicator data in the plurality of monitoring indicator data except the monitoring indicator data; For each monitoring indicator data, a volatility indicator value of the monitoring indicator data is calculated based on multiple 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 content 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; According to the weight value corresponding to each monitoring indicator data, multiple monitoring indicator data are weighted and summed to obtain the static load accumulation index of the coal seam at the hole depth.

[0108] In some embodiments of the present application, the hole expansion subunit 8052 can also be used for: Comparing the aperture adaptive adjustment coefficient with a preset second threshold to obtain a comparison result; When the comparison result shows 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 is performed to obtain the target coal powder weight at the target hole depth position.

[0109] In some embodiments of the present application, the device may further include a supplementary hole expansion unit, which is specifically used to: 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 a 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 the 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 corresponding first discharge speed is returned to execute until the length of the drilling depth interval is less than or equal to the preset fourth threshold value.

[0110] In some embodiments of the present application, the supplementary hole expansion unit is further used for: Derivative 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.

[0111] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0112] According to the coal seam adaptive hole expansion and pressure relief device based on high static load identification proposed in the embodiment of the present disclosure, a plurality of monitoring index data related to the degree of static load accumulation at each hole depth position of the initial borehole in the coal seam is obtained; the static load accumulation index of the coal seam at each hole depth position is calculated by using the plurality of monitoring index data corresponding to each hole depth position; the stable value of the static load accumulation index is determined by using the static load accumulation index corresponding to each hole depth position, and the weight of coal powder generated at the hole depth position corresponding to the stable value is determined to obtain the first coal powder weight; according to the stable value and the static load accumulation index corresponding to each hole depth position, a high static load accumulation area is selected from the initial borehole; for each in the high static load accumulation area, At the target hole depth position, the target coal powder weight corresponding to the target hole depth position is determined according to the static load accumulation index, stability value and first coal powder weight corresponding to the target hole depth position; the hole expansion and pressure relief operation is performed at the target hole depth position until the second coal powder weight generated by the hole expansion at the target hole depth position is equal to the target coal powder weight, so as to complete the adaptive hole expansion and pressure relief at different target hole depth positions in the initial drilling hole, thereby achieving the purpose of adaptively performing the hole expansion operation according to the static load accumulation degree at different hole depth positions in the coal seam, so that the borehole diameter is adaptively matched with the impact hazard, and then it can be ensured that the high static loads at different depth positions in the coal seam can be fully released, which effectively improves the drilling pressure relief efficacy and the impact ground pressure disaster prevention and control effect. Fig. 9 1 is a block diagram of a device for a method for adaptively expanding and decompressing a coal seam based on high static load identification according to an exemplary embodiment. For example, the device 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.

[0113] Reference Fig. 9 , the device 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 .

[0114] The processing component 902 generally controls the overall operation of the device 900, such as operations associated with display, phone 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-mentioned 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.

[0115] The memory 904 is configured to store various types of data to support operations on the device 900. Examples of such data include instructions for any application or method operating on the device 900, contact data, phone book data, messages, pictures, videos, etc. The memory 904 can 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, magnetic disk or optical disk.

[0116] The power component 906 provides power to the various components of the device 900. The power component 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 900.

[0117] 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 may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide 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 may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0118] The audio component 910 is configured to output and / or input audio signals. For example, the audio component 910 includes a microphone (MIC), and when the device 900 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 904 or sent via the communication component 916. In some embodiments, the audio component 910 also includes a speaker for outputting audio signals.

[0119] I / O interface 912 provides an interface between processing component 902 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0120] The sensor assembly 914 includes one or more sensors for providing various aspects of status assessment for the device 900. For example, the sensor assembly 914 can detect the open / closed state of the device 900, the relative positioning of components, such as the display and keypad of the device 900, and the sensor assembly 914 can also detect the position change 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 assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0121] The communication component 916 is configured to facilitate wired or wireless communication between the device 900 and other devices. The device 900 can 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 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0122] In an exemplary embodiment, the apparatus 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 to perform the above methods.

[0123] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 904 including instructions, and the instructions can be executed by a processor 920 of the device 900 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0124] In an exemplary embodiment, a computer program product is also provided, comprising a computer program, which implements the above method when executed by the processor 920 of the device 900 .

[0125] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0126] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only 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; An adaptive hole enlarging and pressure relief operation is performed 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.

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 1, characterized in that: 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 among the plurality of monitoring indicator data corresponding to the hole depth position, calculating a correlation index value between the monitoring indicator data and other monitoring indicator data among the plurality of monitoring indicator data except the monitoring indicator data; For each monitoring indicator data, calculating a volatility indicator value of the monitoring indicator data based on the plurality of 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.

5. 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.

6. 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.

7. The method for self-adaptive hole expansion and pressure relief in coal seams based on high static load identification according to claim 6, 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.

8. A coal seam adaptive hole expansion and pressure relief device 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.

9. 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 6 is implemented.

10. 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 6 is implemented.

11. 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 6 when executed by a processor.

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