Method and system for judging feasibility of prevention and treatment of high mine pressure during upward mining in mine field

Abstract

The invention provides a mine field upward mining strong mine pressure prevention feasibility judgment method and system, and belongs to the field of mine field mining, and the method comprises the steps: obtaining mining parameters through on-site survey; according to the mining parameters, an interlayer mining thickness ratio, a key mining thickness ratio, a collapse mining ratio and a fracture mining ratio are obtained through analysis and calculation; and according to the comparison of the interlayer mining thickness ratio and the collapse mining ratio and the comparison of the key mining thickness ratio and the fracture mining ratio, the prevention and control feasibility of the mine field upward mining strong mine pressure is determined. According to the method, the prevention and control feasibility of the possible dynamic pressure disasters can be pre-judged in the multi-ore-bed mining design stage, and a scientific design basis is provided for prevention and control of thick-layer roof type strong dynamic load mine pressure or rock burst in high-strength mining of a deep working face.

Description

Technical Field

[0001] The present invention relates to the field of mine mining, and more specifically, to a method and system for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine. Background Art

[0002] With the continuous development of underground mining technology in my country, especially with the continuous progress of coal mining technology in my country, the improvement of mining speed and technical level in the field of underground coal mining has led to an increase in the number of high-intensity mining faces with close-range multi-coal seams year by year. This trend has aggravated the risk of roof dynamic pressure disasters such as strong dynamic mine pressure and rock burst in the working face. Roof dynamic pressure disasters are mainly divided into three categories according to the disaster mechanism: fault disaster type, wide coal pillar disaster type, and thick roof disaster type. Among them, thick roof disaster type is the main form of roof disaster in deep high-intensity mining mines. In response to the strong dynamic pressure disaster caused by thick roof, in recent years, the coal mining industry has adopted technical measures for the prevention and control of dynamic pressure disasters, including underground short-hole hydraulic fracturing, directional long-hole regional hydraulic fracturing, and ground horizontal or vertical well regional fracturing, and has achieved certain on-site governance effects. However, these measures have not been able to completely avoid or eliminate the occurrence of thick roof disaster-induced dynamic pressure disasters. In terms of strong mine pressure prevention and control, there is a lack of methods to determine the feasibility of thick roof disaster-induced dynamic pressure disaster prevention and control. Summary of the invention

[0003] The present invention provides a method and system for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, which can predict the feasibility of preventing and controlling thick-layer roof disaster-causing dynamic pressure disasters in the multi-layer mining design stage.

[0004] The present invention provides a method for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, comprising: Obtaining mining parameters through on-site survey, wherein the mining parameters include a lower layer mining thickness as the thickness of the lower mineral layer and an interlayer spacing as the spacing between mineral layers; According to the mining parameters, the interlayer mining thickness ratio, the key mining thickness ratio, the collapse mining ratio and the crack mining ratio are obtained through analysis and calculation; and Determine the feasibility of preventing and controlling strong mine pressure in upward mining of the mine field according to the comparison between the inter-layer mining thickness ratio and the collapse mining ratio and the comparison between the key mining thickness ratio and the crack mining ratio; in: The analytical calculations include: The calculation of the interlayer mining thickness ratio includes: calculating the ratio of the interlayer spacing to the lower layer mining thickness, that is, the interlayer mining thickness ratio; The calculation of the critical mining thickness ratio includes: obtaining the dynamic pressure critical layer height according to the mining parameter analysis, the dynamic pressure critical layer height is the height of the dynamic pressure critical layer from the lower ore layer; calculating the ratio of the dynamic pressure critical layer height to the lower layer mining thickness, that is, the critical mining thickness ratio; The calculation of the collapse ratio includes: obtaining the collapse zone height of the roof according to the mining parameter analysis; calculating the ratio of the collapse zone height to the mining thickness of the lower layer, that is, the collapse ratio; and The calculation of the fracture-mining ratio includes: obtaining the fracture zone height of the roof according to the mining parameter analysis; and calculating the ratio of the fracture zone height to the mining thickness of the lower layer, that is, the fracture-mining ratio.

[0005] In some embodiments, obtaining the collapse zone height of the roof according to the mining parameter analysis includes: according to the mining parameters, using at least one of a numerical simulation method, a physical simulation method and a field measurement method to obtain the intermediate collapse zone heights respectively, taking the average of the intermediate collapse zone heights, and calculating the collapse zone height.

[0006] In some embodiments, obtaining the fracture zone height of the roof according to the mining parameter analysis includes: according to the mining parameters, using at least one of a numerical simulation method, a physical simulation method and a field measurement method to obtain the intermediate fracture zone heights respectively, taking the average of the intermediate fracture zone heights, and calculating the fracture zone height.

[0007] In some embodiments, obtaining the key layer height of dynamic pressure according to the mining parameter analysis includes: analyzing and calculating, according to the mining parameters, the layer height of the top disaster-causing layer in the medium-hard and above rock strata with a thickness greater than 10m within 100m above the upper mining layer, that is, the key layer height of dynamic pressure.

[0008] In some embodiments, the numerical simulation method is any one of UDEC, 3DEC and FLAC3D.

[0009] In some embodiments, the on-site measurement method is any one of borehole leakage and borehole peek.

[0010] In some embodiments, the method further includes: when the inter-layer mining thickness ratio is less than the collapse mining ratio, determining that upward mining is not feasible, and ending the feasibility determination of upward mining strong mine pressure prevention and control.

[0011] In some embodiments, the method further comprises: When the interlayer mining thickness ratio is greater than or equal to the collapse mining ratio, it is determined that upward mining is feasible, and the key mining thickness ratio and the crack mining ratio are further compared, and, When the critical mining thickness ratio is greater than the crack mining ratio, it is determined that upward mining is feasible, but it is not feasible for preventing and controlling strong mine pressure; and When the critical mining thickness ratio is less than or equal to the crack mining ratio, it is determined that upward mining is feasible and it is also feasible to prevent and control strong mine pressure.

[0012] The present invention also provides a system for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, which is characterized by comprising: a collection module, an evaluation module and an output module; wherein The acquisition module is configured to: receive input information from a user and transmit the input information to the evaluation module, wherein the input information includes the interlayer spacing, the lower layer mining thickness, the dynamic pressure key layer height, the collapse zone height and the fracture zone height obtained according to the above-mentioned method for determining the feasibility of strong mine pressure prevention and control in upward mining of a mine field of the present invention; The evaluation module is configured to: perform data processing on the input information and transmit the processing result to the output module, wherein the data processing includes executing the method for feasibility determination of strong mine pressure prevention and control in upward mining in a mine according to the present invention, and based on the inter-layer spacing, the lower layer mining thickness, the dynamic pressure key layer height, the collapse zone height and the fracture zone height, calculate the inter-layer mining thickness ratio, the key mining thickness ratio, the collapse ratio and the fracture ratio, and compare the inter-layer mining thickness ratio with the collapse ratio and compare the key mining thickness ratio with the fracture ratio to form a determination result, wherein the processing result includes the determination result; and The output module is configured to output the processing result transmitted by the evaluation module.

[0013] In some embodiments, the system further comprises a data storage device for storing the processing results.

[0014] The method and system for determining the feasibility of preventing and controlling strong mine pressure in upward mining in a mine provided by the present invention obtain mining parameters obtained from on-site survey of the mine, obtain the height of the collapse zone and the height of the fissure zone according to digital simulation, physical simulation and on-site measurement, and obtain the height of the key layer of dynamic pressure in combination with the discrimination conditions of the key layer of dynamic pressure, so as to determine the feasibility of upward mining for preventing and controlling strong mine pressure on the working face. It can predict the feasibility of preventing and controlling dynamic pressure disasters that may occur in the design stage of multi-layer mining, and provide a scientific design basis for preventing and controlling strong dynamic load mine pressure or rock burst in the thick roof during high-intensity mining of deep working faces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a flow chart of a method for determining the feasibility of strong mine pressure prevention and control in upward mining of a mine according to an embodiment of the present invention; Figure 2is a numerical simulation schematic diagram of determining the collapse zone height and the fracture zone height of the roof according to an embodiment of the present invention; Figure 3 is a physical simulation schematic diagram of determining the collapse zone height and the fracture zone height of the roof according to an embodiment of the present invention; Figure 4 It is a schematic diagram of drilling arrangement of a downhole upward hole leak detection method for determining the collapse zone height and the fracture zone height of the roof according to an embodiment of the present invention; Figure 5 It is a schematic diagram of a measured curve of segmented leakage volume of a downhole upward hole leakage detection method for determining the collapse zone height and the fracture zone height of the roof according to an embodiment of the present invention; Figure 6 Schematic diagram of a method for determining the feasibility of upward mining K value according to an embodiment of the present invention; Figure 7 Schematic diagram of a method for determining the feasibility of L value for controlling strong mine pressure in upward mining according to an embodiment of the present invention; Figure 8 It is a schematic diagram of a feasibility determination system for preventing and controlling strong mine pressure in upward mining in a mine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] It should be further noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0020] In the present invention, "at least one" means one or more, and "more" means two or more than two. The terms "first", "second", "third", "fourth", etc. (if any) in the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0021] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary", "as an example" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "as an example" or "for example" is intended to present related concepts in a specific way.

[0022] The present invention is applicable to the feasibility determination of strong mine pressure prevention and control in upward mining of multi-layer mines such as coal mines, gypsum mines, etc., and is particularly applicable to the feasibility determination of strong mine pressure prevention and control in upward mining of multi-layer coal mines. For ease of description, various embodiments of the present invention will be described below taking multi-layer coal mines as an example.

[0023] The present invention provides a method for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, comprising: Step S110, obtaining mining parameters through on-site survey, the mining parameters include the lower layer mining thickness m, and the layer spacing H, where m is the thickness of the lower ore layer and H is the spacing between adjacent ore layers.

[0024] In some embodiments, the mining parameters obtained through on-site survey also include: tensile stress , rock tensile strength , vertical displacement Zn, strain ε, rock formation elastic modulus, rock formation thickness, rock formation density, etc.

[0025] Step S120, according to the mining parameters, through analysis and calculation, the interlayer mining thickness ratio K, the key mining thickness ratio L, the collapse mining ratio K0 and the crack mining ratio L0 are obtained.

[0026] Specifically, the calculation of the interlayer mining thickness ratio K includes: calculating the ratio of the interlayer spacing H to the lower layer mining thickness m, that is, the interlayer mining thickness ratio K = H / m. Among them, H is the spacing between adjacent ore layers, and m is the thickness of the lower ore layer. H and m can be directly obtained through on-site surveys of multi-layer coal mines.

[0027] The calculation of the collapse ratio K0 and the crack mining ratio L0 includes: obtaining the collapse zone height H0 and the crack zone height D0 of the roof according to the mining parameter analysis; calculating the ratio of the collapse zone height H0 to the lower mining thickness m, that is, the collapse ratio K0 = H0 / m; calculating the ratio of the crack zone height D0 to the lower mining thickness m, that is, the crack mining ratio L0 = D0 / m. Among them, m is the thickness of the lower ore layer.

[0028] The calculation of the critical mining thickness ratio L includes: obtaining the dynamic pressure critical layer height D according to the mining parameter analysis, and then calculating the ratio of the dynamic pressure critical layer height D to the lower layer mining thickness m, that is, the critical mining thickness ratio L = D / m. Among them, D is the height of the dynamic pressure critical layer from the lower ore layer, and m is the thickness of the lower ore layer.

[0029] In some embodiments, the collapse zone height H0 and the fracture zone height D0 are obtained in the following manner: according to the mining parameters, at least one of the numerical simulation method, the physical simulation method and the field measurement method is used to obtain the middle collapse zone height and the middle fracture zone height respectively, and the obtained results are averaged to calculate the collapse zone height H0 and the fracture zone height D0. That is to say, when only one method is used, the collapse zone height H0 and the fracture zone height D0 are the middle collapse zone height and the middle fracture zone height obtained by the adopted method. When multiple methods are used, the collapse zone height H0 and the fracture zone height D0 are the average values ​​of the middle collapse zone height and the middle fracture zone height obtained by the various methods adopted, respectively. As an example, the collapse zone height H0 and the fracture zone height D0 can be obtained by the same method. In another example, the collapse zone height H0 and the fracture zone height D0 can be obtained by different methods. Preferably, the collapse zone height H0 and the fracture zone height D0 are obtained by the same method.

[0030] The following is a brief introduction to the use of numerical simulation methods, physical simulation methods and field measurement methods to obtain the middle collapse zone height and the middle fracture zone height. For the sake of ease of description, as an example, the collapse zone height H0 and the fracture zone height D0 will be used to represent the middle collapse zone height and the middle fracture zone height.

[0031] In one example, a numerical simulation method for determining the collapse zone height and the fracture zone height of the roof is provided, such as Figure 2 As shown, reference numeral 1 is a coal seam, reference numeral 2 is a collapse zone, and reference numeral 3 is a fracture zone.

[0032] Specifically, refer to Figure 2 , using numerical simulation methods such as UDEC, 3DEC or FLAC3D, a plane calculation model or a three-dimensional calculation model is established according to the actual typical columnar shape of the mine to simulate the actual scene of upward mining under multi-coal seam conditions. By fully excavating the coal seam, the excavation distance should exceed the actual width of the working face, and the stress of at least one column of unit body ID in each overlying rock layer in the middle of the excavation area is monitored during the simulation process. and vertical displacement Zn data, tensile stress of overburden unit ID > As the standard, the damage field distribution range of the overlying rock strata after coal seam 1 mining is obtained, that is, the collapse zone height H0, where is the tensile strength of rock; the vertical displacement Zn data of the unit body ID are extracted, and the change curves of the vertical displacement and different strata are plotted. Above the collapse zone, the drop mutation point of the vertical displacement Zn curve is used as the dividing standard. The displacement of each overburden unit body ID below the mutation point is large, and the displacement of the unit body ID above the mutation point is close to 0. The distribution range of the fractures in the overburden strata after coal seam 1 is mined, that is, the height D0 of the fracture zone, thereby dividing the heights H0 and D0 of the roof collapse zone 2 and the fracture zone 3.

[0033] In one example, a physical simulation method for determining the collapse zone height and the fracture zone height of the roof is provided, such as Figure 3 As shown, reference numeral 2 is a collapse zone, reference numeral 3 is a fracture zone, reference numeral 4 is a lower coal seam, and reference numeral 5 is an upper coal seam.

[0034] Specifically, refer to Figure 3 , the laboratory similar material simulation method is adopted, and the plane modeling is carried out based on the geological occurrence parameters of typical boreholes in multiple coal seams. The damage field and displacement field distribution range of the overlying rock strata after the mining of the upper and lower coal seams under the multi-coal seam conditions are physically simulated. Through the overlying rock damage field after the model excavation, the height of the collapse zone and the fracture zone can be measured and preliminarily intuitively obtained. In order to accurately obtain the height of the collapse zone and the fracture zone, the distributed optical fiber strain monitoring system and the optical displacement measurement system can be further set on the above model to extract the strain ε and vertical displacement Zn data of at least one column of the overlying rock strata in the middle of the model excavation area, and the change curves of strain, vertical displacement and different layer heights can be drawn. In the collapse zone range, the strain and displacement values ​​are large, the curve changes in amplitude are large, and the discreteness is strong; in the fracture zone range, the strain and displacement values ​​are relatively small and there is no discreteness. Compared with the collapse zone, the curve has an obvious drop mutation point. Based on the strain and displacement characteristics of the above-mentioned collapse zone and fracture zone, combined with the preliminary obtained collapse zone and fracture zone height values, the heights H0 and D0 of the roof collapse zone 2 and fracture zone 3 can be accurately divided.

[0035] In one example, a field measurement method for determining the height of the collapse zone and the fracture zone of the roof is provided. The field measurement method adopts the downhole upward hole leakage detection method, which is one of the commonly used methods for measuring the collapse zone and the fracture zone of the roof.

[0036] Specifically, combined with the actual conditions of the coal mine, the drilling diagram of the underground up-hole leak detection method is as follows: Figure 4 As shown, the vertical height of the borehole design is not less than 20 times the mining thickness + 10m. Figure 4The thickness of the middle coal seam is 5.5m, so the vertical height of the borehole is not less than 120m. Hole No. 1 is at a 45-degree angle to the working face and has a depth of 177m. It is used to test the segmented leakage before the working face is mined as a comparison of the post-mining leakage. Holes No. 2 and No. 3 are at a 40.5-degree angle to the working face and have a depth of 187m. They are used to test the segmented leakage after the working face is mined as the basis for the height division of the two zones. The width of the coal pillar is 40m. The measured curve of segmented leakage by the underground upward hole leakage detection method is as follows: Figure 5 As shown, reference numeral 2 is a collapse zone, reference numeral 3 is a fracture zone, and reference numeral 6 is a segmented leakage curve of hole No. 2 and hole No. 3. Figure 4 and Figure 5 By measuring the leakage in sections on site and analyzing the changing rate of the leakage curve 6, the boundary points between the collapse zone and the fracture zone, and between the fracture zone and the curved subsidence zone can be easily divided based on the mutation point of the leakage curve drop. The heights H0 and D0 of the roof collapse zone 2 and the fracture zone 3 can be obtained.

[0037] Although the underground up-hole leakage detection method in the borehole leakage is described above as a field measurement method, this is only an example. The field measurement method can be combined with the actual conditions of the coal mine site, and any one or a combination of the borehole leakage detection method, borehole peep or other methods that can achieve the height measurement of the roof collapse zone and the fracture zone can be selected.

[0038] In some embodiments, the dynamic pressure key layer height D is obtained by analyzing and calculating, based on mining parameters, the stratum height of the roof disaster-causing layer in the medium-hard and above rock strata with a thickness greater than 10m within 100m above the upper mining layer, i.e., the dynamic pressure key layer height D.

[0039] Specifically, in one example, an example of a method for determining the critical layer height D of the overlying thick layer roof is provided, such as Figure 7 As shown, reference numeral 2 is a collapse zone, reference numeral 3 is a fracture zone, reference numeral 4 is a lower coal seam, and reference numeral 5 is an upper coal seam. Combined with the typical borehole columnar diagram of the mine, the rock layers with a thickness greater than 10m and medium hardness or above within 100m above the upper coal seam can be directly found (for example, rock layer 7 and rock layer 8, the heights of rock layer 7 and rock layer 8 from the lower coal seam 4 are D1 and D2 respectively), and then based on the mining parameters obtained from the on-site survey, according to the dynamic pressure key layer stiffness judgment condition or the fracture distance judgment condition, the dynamic pressure key layer (that is, rock layer 7 or rock layer 8) can be found, so as to obtain the stratigraphic height of the thick roof disaster-causing layer overlying the upper coal seam 5, that is, the dynamic pressure key layer height.

[0040] As an example, the dynamic pressure key layer can be obtained based on the mining parameters obtained from the field survey and the dynamic pressure key layer stiffness discrimination conditions. Specifically, if after the upper coal seam 5 is mined, the deformation of the overlying n+1th layer of rock is smaller than the deformation characteristics of the nth layer, that is, the rock layers above the n+1th layer no longer need the lower rock layers to bear any loads it bears, therefore, the n+1th layer can be determined as the dynamic pressure key layer.

[0041] The criteria for determining the stiffness of the key layer of dynamic pressure are as follows: in, In the formula, is the load applied by the nth layer to the ith layer; is the elastic modulus of the i-th rock layer; is the thickness of the i-th rock layer; is the density of the i-th rock layer. The above parameters can be obtained through geomechanical testing based on field surveys.

[0042] As another example, the dynamic pressure critical layer can also be obtained based on the mining parameters obtained from the field survey and the dynamic pressure critical layer breaking distance judgment conditions. Specifically, it is obtained by comparing the breaking distance of each rock layer found with the breaking distance of the first layer. For example, if the n+1th layer is the dynamic pressure critical layer, its breaking distance is , the breaking distance of the first layer is , then the strength judgment condition of the dynamic pressure key layer is as follows: Therefore, as an example, combined with the typical borehole column chart of the mine, based on the mining parameters obtained from the on-site survey, according to the dynamic pressure key layer stiffness judgment condition or the breaking distance judgment condition, it can be found that the dynamic pressure key layer of the upper coal seam 5 is the rock layer 8, so that the dynamic pressure key layer height D can be obtained as the layer height of the rock layer 8 from the lower coal seam 4, that is, D=D2. It should be noted that although the example of rock layer 8 being the dynamic pressure key layer is given here, this is only for the convenience of describing the example of obtaining the dynamic pressure key layer height D. In another example, the dynamic pressure key layer can also be rock layer 7. At this time, the dynamic pressure key layer height D obtained is the layer height of the rock layer 7 from the lower coal seam 4, that is, D=D1.

[0043] In summary, combined with Figures 2 to 5 , step S120 can obtain: Interlayer mining thickness ratio K = H / m Where H is the distance between adjacent ore layers, m is the thickness of the underlying ore layer, and H and m are mining parameters directly obtained through on-site surveys.

[0044] Key mining thickness ratio L = D / m Wherein, D is the height of the dynamic pressure key stratum determined based on the mining parameters in combination with the above key stratum discrimination conditions; m is the thickness of the lower coal seam, which is a mining parameter directly obtained through on-site survey.

[0045] The caving mining ratio K0 = H0 / m Wherein, H0 is the height of the caving zone obtained by at least one of numerical simulation method, physical simulation method and on-site measurement method according to the mining parameters; m is the thickness of the lower coal seam, which is a mining parameter directly obtained through on-site survey.

[0046] The fracturing mining ratio L0 = D0 / m Wherein, D0 is the height of the fractured zone obtained by at least one of numerical simulation method, physical simulation method and on-site measurement method according to the mining parameters; m is the thickness of the lower coal seam, which is a mining parameter directly obtained through on-site survey.

[0047] Step S130, determine the feasibility of preventing and controlling strong mining pressure in upward mining in the mine according to the comparison between the interlayer mining thickness ratio K and the caving mining ratio K0 and the comparison between the key mining thickness ratio L and the fracturing mining ratio L0.

[0048] Specifically, when K < K0, it is determined that upward mining is not feasible and the comparison between L and L0 is no longer made; when K ≥ K0, it is determined that upward mining is feasible and the comparison between L and L0 is further made. Usually K0 ≥ 6.5 - 7.5. As an example, refer to Figure 6 , according to the comparison between the value K obtained in step S120 and the value K0, the feasibility of upward mining in the mine can be determined. In Figure 6 , because H > h, it can be determined that K > K0, that is, K ≥ K0 is satisfied, so it can be determined that upward mining is feasible and the comparison between L and L0 can be further made.

[0049] Specifically, when K ≥ K0 and L > L0, it is determined that upward mining is feasible but not feasible for preventing and controlling strong mining pressure. When K ≥ K0 and L ≤ L0, it is determined that upward mining is feasible and also feasible for preventing and controlling strong mining pressure. As an example, refer to Figure 7 , according to the comparison between the value L obtained in step S120 and the value L0, the feasibility of preventing and controlling strong mining pressure in upward mining can be determined.

[0050] As an example, as Figure 7 shown, when it is determined that rock stratum 8 is the dynamic pressure key stratum according to the dynamic pressure key stratum stiffness discrimination condition, the height of the dynamic pressure key stratum D = D2. At this time, L = L2 = D2 / m. Therefore, K ≥ K0 and L > L0 are satisfied, and it can be determined that upward mining is feasible but not feasible for preventing and controlling strong mining pressure. As another example, as Figure 7As shown, when rock layer 7 is determined to be the key layer for dynamic pressure according to the dynamic pressure key layer stiffness judgment condition, the height of the dynamic pressure key layer D=D1, and at this time L=L1=D1 / m, so K≧K0 and L≦L0 are satisfied, and it can be determined that upward mining is feasible, and it is also feasible for preventing and controlling strong mine pressure.

[0051] The method for determining the feasibility of preventing and controlling strong mine pressure in upward mining in a mine provided by the present invention obtains mining parameters obtained from on-site survey of the mine, obtains the height of the collapse zone and the height of the fissure zone according to digital simulation, physical simulation and on-site measurement, obtains the height of the key layer of dynamic pressure in combination with the discrimination conditions of the key layer of dynamic pressure, determines the feasibility of upward mining for preventing and controlling strong mine pressure on the working face, and can predict the feasibility of preventing and controlling dynamic pressure disasters that may occur in the design stage of multi-mine layer mining, and provide a scientific design basis for preventing and controlling strong dynamic load mine pressure or rock burst in the thick roof of high-intensity mining of deep working faces.

[0052] The present invention also provides a system for determining the feasibility of strong mine pressure prevention and control in upward mining of a mine, which is used to execute the method for determining the feasibility of strong mine pressure prevention and control in upward mining of a mine, such as Figure 8 As shown, the system includes: a collection module 810 , an evaluation module 820 and an output module 830 .

[0053] The acquisition module 810 is configured to: receive input information from the user and transmit the input information to the evaluation module 820, wherein the input information includes reference Figures 1 to 7 The interlayer spacing H, the lower layer mining thickness m, the dynamic pressure key layer height D, the collapse zone height H0 and the fracture zone height D obtained in the method for determining the feasibility of strong mine pressure prevention and control in the mine upward mining described in the paper are as follows: 0。

[0054] The evaluation module 820 is configured to perform data processing on the input information and transmit the processing results to the output module 830, wherein the data processing includes executing the reference Figures 1 to 7 The method for determining the feasibility of strong mine pressure prevention and control in upward mining of a mine is described. Based on the interlayer spacing H, the lower layer mining thickness m, the dynamic pressure key layer height D, the collapse zone height H0 and the fracture zone height D0, the interlayer mining thickness ratio K, the key mining thickness ratio L, the collapse mining ratio K0 and the crack mining ratio L0 are calculated, and the interlayer mining thickness ratio K is compared with the collapse mining ratio K0 and the key mining thickness ratio L is compared with the crack mining ratio L0, the feasibility of strong mine pressure prevention and control in upward mining of the mine is determined, and a determination result is formed. Among them, the processing result transmitted to the output module 830 includes the determination result.

[0055] The output module 830 is configured to output the processing result transmitted by the evaluation module 820 .

[0056] In some embodiments, the system further includes a data storage device for storing the results determined by the evaluation module 820. Non-limiting examples of the data storage device may include magnetic storage media such as floppy disks and hard disks, optical storage media such as CD-ROMs and DVDs, and semiconductor memories such as flash memory, etc.

[0057] In some embodiments, the input information received by the acquisition module 810 also includes reference Figures 2 to 5 The method for determining the feasibility of preventing and controlling strong mine pressure in upward mining in a mine described herein adopts at least one of numerical simulation method, physical simulation method and field measurement method to obtain the middle collapse zone height and the middle fracture zone height; the data processing at the evaluation module 820 also includes taking the average values ​​of the middle collapse zone height and the middle fracture zone height in the input information to obtain the collapse zone height H0 and the fracture zone height D0.

[0058] In some embodiments, the input information received by the acquisition module 810 also includes other information involved in the feasibility determination of the strong mine pressure control in the upward mining of the mine, such as project information, including project name, project number, etc. The evaluation module 820 is also configured to transmit the project information in the input information together with the corresponding feasibility determination result of the strong mine pressure control in the upward mining to the output module 830 for display and storage by project classification.

[0059] In some embodiments, the output module 830 includes a display for displaying the processing results transmitted by the evaluation module 820 .

[0060] The system for determining the feasibility of preventing and controlling strong mine pressure in upward mining in a mine provided by the present invention receives the height of the collapse zone and the height of the fissure zone obtained by digital simulation, physical simulation and on-site measurement, and obtains the key layer height of dynamic pressure in combination with the dynamic pressure key layer identification condition, and obtains the interlayer mining thickness ratio, key mining thickness ratio, collapse mining ratio and fissure mining ratio. By comparing the corresponding data, the feasibility of upward mining for preventing and controlling strong mine pressure on the working face is determined, and the feasibility of preventing and controlling possible dynamic pressure disasters can be predicted in the design stage of multi-layer mining.

[0061] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0062] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, characterized in that: include: Obtaining mining parameters through on-site survey, wherein the mining parameters include a lower layer mining thickness as the thickness of the lower mineral layer and an interlayer spacing as the spacing between mineral layers; According to the mining parameters, the interlayer mining thickness ratio, the key mining thickness ratio, the collapse mining ratio and the crack mining ratio are obtained through analysis and calculation; as well as Determine the feasibility of preventing and controlling strong mine pressure in upward mining of the mine field according to the comparison between the inter-layer mining thickness ratio and the collapse mining ratio and the comparison between the key mining thickness ratio and the crack mining ratio; in: The analytical calculations include: The calculation of the interlayer mining thickness ratio includes: calculating the ratio of the interlayer spacing to the lower layer mining thickness, that is, the interlayer mining thickness ratio; The calculation of the critical mining thickness ratio includes: obtaining the dynamic pressure critical layer height according to the mining parameter analysis, the dynamic pressure critical layer height is the height of the dynamic pressure critical layer from the lower ore layer; calculating the ratio of the dynamic pressure critical layer height to the lower layer mining thickness, that is, the critical mining thickness ratio; The calculation of the collapse ratio includes: obtaining the collapse zone height of the roof according to the mining parameter analysis; calculating the ratio of the collapse zone height to the mining thickness of the lower layer, that is, the collapse ratio; and The calculation of the fracture-mining ratio includes: obtaining the fracture zone height of the roof according to the mining parameter analysis; and calculating the ratio of the fracture zone height to the mining thickness of the lower layer, that is, the fracture-mining ratio.

2. The method according to claim 1, characterized in that The roof collapse zone height obtained according to the mining parameter analysis includes: According to the mining parameters, at least one of numerical simulation method, physical simulation method and field measurement method is used to obtain the middle collapse zone height respectively, and the middle collapse zone height is averaged to calculate the collapse zone height.

3. The method according to claim 1, characterized in that The method of obtaining the height of the fracture zone of the roof according to the mining parameter analysis includes: According to the mining parameters, at least one of a numerical simulation method, a physical simulation method and a field measurement method is used to obtain the middle fracture zone height respectively, and the middle fracture zone height is averaged to calculate the fracture zone height.

4. The method according to claim 1, characterized in that: The obtaining of the key layer height of dynamic pressure according to the mining parameter analysis comprises: According to the mining parameters, the layer height of the roof disaster-causing layer in the medium-hard and above rock strata with a thickness greater than 10m within 100m above the upper ore layer, that is, the key layer height of dynamic pressure, is analyzed and calculated.

5. The method according to claim 2 or 3, characterized in that: The numerical simulation method is any one of UDEC, 3DEC and FLAC3D.

6. The method according to claim 2 or 3, characterized in that: The on-site measurement method is any one of borehole leakage and borehole peep.

7. The method according to claim 1, characterized in that The method further comprises: When the interlayer mining thickness ratio is less than the collapse mining ratio, it is determined that upward mining is not feasible, and the feasibility determination of upward mining strong mine pressure prevention and control is terminated.

8. The method according to claim 7, characterized in that The method further comprises: When the interlayer mining thickness ratio is greater than or equal to the collapse mining ratio, it is determined that upward mining is feasible, and the key mining thickness ratio and the crack mining ratio are further compared, and, When the critical mining thickness ratio is greater than the crack mining ratio, it is determined that upward mining is feasible, but it is not feasible for preventing and controlling strong mine pressure; and When the critical mining thickness ratio is less than or equal to the crack mining ratio, it is determined that upward mining is feasible and it is also feasible to prevent and control strong mine pressure.

9. A system for determining the feasibility of preventing and controlling strong mine pressure in upward mining of a mine, characterized in that: include: Acquisition module, evaluation module and output module; in The acquisition module is configured to: receive input information from a user and transmit the input information to the evaluation module, wherein the input information includes the interlayer spacing, the lower layer mining thickness, the dynamic pressure key layer height, the collapse zone height and the fracture zone height obtained according to the method for feasibility determination of strong mine pressure prevention and control in upward mining in a mine according to claims 1 to 8; The evaluation module is configured to: perform data processing on the input information and transmit the processing result to the output module, wherein the data processing includes executing the method for determining the feasibility of strong mine pressure prevention and control in upward mining in a mine according to claims 1 to 8, and calculating the interlayer mining thickness ratio, the key mining thickness ratio, the collapse mining ratio and the crack mining ratio based on the interlayer spacing, the lower layer mining thickness, the dynamic pressure key layer height, the collapse zone height and the fracture zone height, and comparing the interlayer mining thickness ratio with the collapse mining ratio and comparing the key mining thickness ratio with the crack mining ratio to form a determination result, wherein the processing result includes the determination result; and The output module is configured to output the processing result transmitted by the evaluation module.

10. The system according to claim 9, characterized in that The system further comprises a data storage device for storing the processing result.

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