CN-115544616-B - Method, device and storage medium for coordinated control of overburden rock deformation of continuous mining and continuous filling working face

CN115544616BCN 115544616 BCN115544616 BCN 115544616BCN-115544616-B

Abstract

The application relates to a method and a device for coordinated control of overburden rock deformation of a continuous mining and continuous charging working surface and a storage medium. The method comprises the steps of respectively obtaining the height of a strip coal pillar of a target coal mining area and a preset cover rock sinking value, respectively determining the width of the strip coal pillar and the number of filling wheels of the target coal mining area, constructing a cover rock coordinated deformation model based on the number of filling wheels of the target coal mining area, respectively obtaining the distribution load concentration of the cover rock of the target coal mining area, the uniaxial compressive strength of a coal body and the elastic modulus of the coal body, determining the target elastic modulus of the filling body and the total cover rock sinking amount through the cover rock coordinated deformation model according to the width of the strip coal pillar, the height of the strip coal pillar, the distribution load concentration of the cover rock, the uniaxial compressive strength of the coal body and the preset cover rock sinking value, and determining the target uniaxial compressive strength of the filling body based on the uniaxial compressive strength of the coal body and the target elastic modulus of the filling body. The application improves the rationality and accuracy of key parameters of coal resource filling displacement exploitation.

Inventors

FAN ZHIZHONG
HUANG ZHIZENG
PAN JUNFENG
WANG CHUANPENG
LIU PENGLIANG
CUI FENG
PAN LIMING
YU JIANHAO
WANG HAOYU

Assignees

中煤科工开采研究院有限公司
天地科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220923

Claims (7)

1. The method for coordinated control of the overburden rock deformation of the continuous mining and continuous filling working face is characterized by comprising the following steps: respectively acquiring the height of a strip coal pillar of a target coal mining area and a preset overburden subsidence value; respectively determining the width of the strip coal pillar and the number of filling mining wheels of a target coal mining area; Determining a cover rock coordinated deformation model based on the mining wheel number of the target coal mining area; Respectively obtaining the distribution load concentration of the overburden layer, the uniaxial compressive strength of the coal body and the elastic modulus of the coal body of the target coal mining area; Determining a target elastic modulus of the filler and total subsidence of the overburden by the overburden coordinated deformation model according to the width of the strip coal pillar, the height of the strip coal pillar, the distribution load concentration of the overburden, the uniaxial compressive strength of the coal body and the preset overburden subsidence value; determining the target uniaxial compressive strength of the filling body based on the uniaxial compressive strength of the coal body and the target elastic modulus of the filling body; The determining the cover rock coordination deformation model based on the mining wheel number of the target coal mining area comprises the following steps: Acquiring the distribution load concentration of the overburden rock; Respectively determining a cover rock subsidence calculation formula of each round of mining of the target coal mining area according to the width of the strip coal pillar, the distribution load concentration of the cover rock and the number of mining wheels of the target coal mining area; determining a total subsidence calculation formula of the overburden based on the calculation formula of the subsidence calculation of the overburden of each round of mining of the target coal mining area, and determining the total subsidence calculation formula of the overburden as the overburden coordinated deformation model; the overlying strata coordinated deformation model specifically comprises the following steps: wherein, the coal body area to be mined is divided into The coal pillar is arranged in a plurality of strips, For the length of the filling area, Load concentration is distributed for overburden over the fill area, Is the rigidity coefficient of a single strip coal column, For the rigidity coefficient of a single filling strip, m is the number of filling mining wheels of a target coal mining area, x 1 is the subsidence of overburden for the first wheel mining, x 2 is the subsidence of overburden for the second wheel mining, x 3 is the subsidence of overburden for the third wheel mining, x m-1 is the subsidence of overburden for the m-1 wheel mining, and x m is the subsidence of overburden for the m-th wheel mining; Wherein, based on the coal body uniaxial compressive strength, the filler target elastic modulus, confirm the filler target uniaxial compressive strength, include: acquiring the uniaxial compressive strength of the coal body; and calculating the target uniaxial compressive strength of the filling body according to the uniaxial compressive strength of the coal body, the elastic modulus of the coal body, the target elastic modulus of the filling body, the width of the strip coal pillar and the height of the strip coal pillar.
2. The method of claim 1, wherein the determining, by the overburden coordinated deformation model, the target elastic modulus of the filler and the actual overburden subsidence total amount based on the strip coal pillar width, the strip coal pillar height, the overburden distributed load concentration, the uniaxial compressive strength of the coal, and the preset overburden subsidence value comprises: acquiring the elastic modulus of a preset filling body; inputting the elastic modulus of the preset filling body, the width of the strip coal pillar, the height of the strip coal pillar, the distribution load concentration of the overburden layer and the uniaxial compressive strength of the coal body into the overburden coordinated deformation model; Acquiring the total subsidence amount of the cover rock output by the cover rock coordinated deformation model; Comparing the total subsidence amount of the cover rock with the preset subsidence value of the cover rock to obtain a comparison result; In response to the comparison result that the total subsidence amount of the cover rock is smaller than or equal to the preset cover rock subsidence value, determining the total subsidence amount of the cover rock as an actual total subsidence amount of the cover rock, determining the width of the strip coal pillar as a target strip coal pillar width, and determining the preset filler elastic modulus as a filler target elastic modulus; And in response to the comparison result that the actual total subsidence amount of the overburden is larger than the preset subsidence value of the overburden, the step of determining the width of the strip coal pillar and the mining wheel number of the target coal mining area is re-executed.
3. The method of claim 1, wherein the determining, by the cover-rock coordinated deformation model, the elastic modulus of the filling body and the actual total cover-rock subsidence according to the continuous-mining continuous-charging strip coal pillar width, the strip coal pillar height, the cover-rock layer distribution load concentration, the uniaxial compressive strength of the coal body, and the preset cover-rock subsidence value, further comprises: Determining the preset overburden subsidence value as the maximum value of the total overburden subsidence amount; inputting the strip coal pillar width, the strip coal pillar height, the overburden layer distribution load concentration, the uniaxial compressive strength of the coal body and the maximum value of the total overburden sinking amount into the overburden coordinated deformation model; acquiring a filler target elastic modulus threshold value output by the overlying strata coordinated deformation model; And determining the target elastic modulus of the filling body based on the target elastic modulus threshold value of the filling body.
4. The method according to claim 1, wherein the calculation formula of the target uniaxial compressive strength of the filler is specifically: Wherein, the The uniaxial compressive strength of the filler is; The uniaxial compressive strength of the coal body is; height of the filling strip; for a single filling strip width, Is the elastic modulus of the coal body, Is the target elastic modulus of the filling body.
5. A continuous production continuous filling face cover rock coordinated deformation control device, characterized in that the method of any one of claims 1-4 is adopted, and the device comprises: the first acquisition module is used for respectively acquiring the height of the strip coal pillar of the target coal mining area and a preset overburden subsidence value; the first determining module is used for determining the width of the strip coal pillar and the mining wheel number of the target coal mining area respectively; the second determining module is used for determining a cover rock coordination deformation model based on the mining wheel number of the target coal mining area; The second acquisition module is used for respectively acquiring the overburden layer distribution load concentration, the uniaxial compressive strength of the coal body and the elastic modulus of the coal body of the target coal mining area; the third determining module is used for determining the target elastic modulus of the filling body and the total subsidence amount of the overburden according to the width of the strip coal pillar, the height of the strip coal pillar, the distribution load concentration of the overburden, the uniaxial compressive strength of the coal body and the preset overburden subsidence value through the overburden coordinated deformation model; And the fourth determining module is used for determining the target uniaxial compressive strength of the filling body based on the uniaxial compressive strength of the coal body and the target elastic modulus of the filling body.
6. An electronic device comprising a processor and a memory communicatively coupled to the processor; the memory stores computer-executable instructions; The processor executes computer-executable instructions stored in the memory to implement the method of any one of claims 1-4.
7. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-4.

Description

Method, device and storage medium for coordinated control of overburden rock deformation of continuous mining and continuous filling working face Technical Field The application relates to the technical field of coal mining, in particular to a method and a device for coordinated control of overburden rock deformation of a continuous mining and continuous charging working face and a storage medium. Background In the related art, the continuous mining and continuous filling mining technology is a replacement filling mining method, filling materials such as paste are often adopted to replace strip coal pillars one by one, the paste is conveyed to a branch roadway port during filling, and is injected into a sealed branch roadway space, and coal resource mining is realized by means of gangue coal replacement and zero strip coal pillar mining. The paste continuous mining continuous charging technology is an effective method for releasing three-step coal compacting of buildings, water bodies, roads and the like, but if the key parameters are improperly designed, serious consequences can be caused, such as deformation, cracking and the like of the buildings when the surface subsidence value exceeds the allowable value, and the capacity or economic benefit of the mine is lower than expected, even loss is caused. Disclosure of Invention Therefore, the application provides a method and a device for coordinated control of overburden rock deformation of a continuous mining and continuous charging working face and a storage medium. The technical scheme of the application is as follows: according to a first aspect of the embodiment of the application, a method for coordinated control of overburden deformation of continuous mining and continuous charging working surfaces is provided, and the height of a strip coal pillar and a preset overburden subsidence value of a target coal mining area are respectively obtained; respectively determining the width of the strip coal pillar and the mining wheel number of a target coal mining area; Determining a cover rock coordinated deformation model based on the mining wheel number of the target coal mining area; Respectively obtaining the distribution load concentration of the overburden layer, the uniaxial compressive strength of the coal body and the elastic modulus of the coal body of the target coal mining area; Determining a target elastic modulus of the filler and total subsidence of the overburden by the overburden coordinated deformation model according to the width of the strip coal pillar, the height of the strip coal pillar, the distribution load concentration of the overburden, the uniaxial compressive strength of the coal body and the preset overburden subsidence value; And determining the target uniaxial compressive strength of the filling body based on the uniaxial compressive strength of the coal body and the target elastic modulus of the filling body. According to one embodiment of the application, the determining the cover rock coordinated deformation model based on the mining wheel number of the target coal mining area comprises: Acquiring the distribution load concentration of the overburden rock; Respectively determining a cover rock subsidence calculation formula of each round of mining of the target coal mining area according to the width of the strip coal pillar, the distribution load concentration of the cover rock and the number of mining wheels of the target coal mining area; and determining a total subsidence amount calculation formula of the overburden based on the calculation formula of the subsidence amount of the overburden of each round of mining of the target coal mining area, and determining the calculation formula of the total subsidence amount of the overburden as the overburden coordinated deformation model. According to one embodiment of the application, the cover rock coordinated deformation model is specifically: The method comprises the steps of dividing a coal body area to be mined into n supporting strip coal pillars, wherein l is the trend length of a working surface, q is the distribution load concentration of overlying strata, k 0 is the rigidity coefficient of a single strip coal pillar, k 1 is the rigidity coefficient of a single filling strip, m is the mining wheel number of a target coal mining area, x 1 is the subsidence of overlying strata of a first wheel mining, x 2 is the subsidence of overlying strata of a second wheel mining, x 3 is the subsidence of overlying strata of a third wheel mining, x m-1 is the subsidence of overlying strata of an m-1 wheel mining, and x m is the subsidence of overlying strata of an m-th wheel mining. According to one embodiment of the present application, the determining, according to the stripe coal pillar width, stripe coal pillar height, overburden layer distribution load concentration, uniaxial compressive strength of a coal body and a preset overburden subsidence value, the target elastic modulus