CN-122014254-A - Method, equipment and medium for precisely controlling initial caving and pressure relief of working face

Abstract

The invention relates to the technical field of coal mine roof control, and discloses a method, equipment and medium for accurately controlling primary roof caving and pressure relief of a working face, wherein the method comprises the steps of implementing directional fracturing on a roof behind a coal mine working face cut to obtain a roof comprising a weakening ring; determining a step distance parameter according to the top plate containing the weakening ring, calculating a primary breaking step distance of the top plate containing the weakening ring based on the step distance parameter, monitoring the fracturing drilling depth of directional fracturing in real time, and regulating and controlling the primary breaking step distance in real time according to the fracturing drilling depth. The invention can change the boundary condition of the top plate, reduce the limit span, and combine the empirical formula and the drilling parameter regulation and control to realize the accurate control of the primary breaking step distance of the top plate.

Inventors

• Han Jiazhang
• SANG YANQING
• WEI MIN
• YUAN ZHEN
• LUO SHENGBING
• SHAO GUANGYIN
• LI SHIHUI
• YUAN LIN
• LIU KEYU
• LI XIAOLU
• LI ZHIHONG
• WANG CHUANBING
• LIU JIEGAO
• HOU JUNLING
• ZHANG JIBING
• LI QUN
• ZHANG JIUZHOU
• YU YOUCUN

Assignees

• 淮南矿业(集团)有限责任公司
• 攀枝花学院

Dates

Publication Date

20260512

Application Date

20251107

Claims (4)

1. 1. The method for precisely controlling the initial caving and pressure relief of the working face is characterized by comprising the following steps of: performing directional fracturing on a top plate behind a coal mine working face cut hole to obtain a top plate containing a weakening ring; determining a step distance parameter according to the top plate containing the weakening ring, and calculating the primary breaking step distance of the top plate containing the weakening ring based on the step distance parameter; And monitoring the fracturing drilling depth of directional fracturing in real time, and regulating and controlling the primary breaking step distance in real time according to the fracturing drilling depth.
2. 2. The method for precisely controlling the initial set-down and pressure relief of a working surface according to claim 1, wherein said calculating the initial breaking step of the top plate comprising the ring of weakness based on the step parameters comprises: The primary break step is calculated using the empirical formula: Wherein, the The first break step distance is indicated as the first break step distance, Representing a preset coefficient between the thickness of the roof strata and the step distance, Representing the thickness of the roof strata.
3. 3. A processing device comprising at least one processor and at least one memory communicatively coupled to the processor, wherein the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-2.
4. 4. A computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 2.

Description

Method, equipment and medium for precisely controlling initial caving and pressure relief of working face Technical Field The invention relates to the technical field of coal mine roof control, in particular to a method, equipment and medium for accurately controlling primary roof caving and pressure relief of a working face. Background In the initial mining stage of the coal mine longwall mining working face, the roof strata is supported by solid coal walls at the periphery to form a four-side solid support plate structure, and O-X type fracture is easy to occur under the influence of mining. The fracture mode causes the damage of the integrity of the top plate, the load of the overlying strata is rapidly transferred to the coal wall in front of the working face and the surrounding rock of the roadway, and potential safety hazards such as coal wall caving, strong dynamic pressure impact of the roadway, failure of a supporting system and the like are caused. The traditional passive supporting mode is difficult to effectively control the roof caving process, the risk of large-area roof caving exists, and mine safety production is seriously affected. Therefore, how to actively control the fracture process of the top plate and realize accurate pressure relief becomes a problem to be solved. Disclosure of Invention The invention aims to solve the technical problems of automatically controlling the fracture process of the top plate and realizing accurate pressure relief. The invention solves the technical problems by the following technical means: the invention provides a method for precisely controlling primary roof caving and pressure relief of a working face, which is characterized by comprising the following steps: performing directional fracturing on a top plate behind a coal mine working face cut hole to obtain a top plate containing a weakening ring; determining a step distance parameter according to the top plate containing the weakening ring, and calculating the primary breaking step distance of the top plate containing the weakening ring based on the step distance parameter; And monitoring the fracturing drilling depth of directional fracturing in real time, and regulating and controlling the primary breaking step distance in real time according to the fracturing drilling depth. The invention also provides processing equipment which is characterized by comprising at least one processor and at least one memory in communication connection with the processor, wherein the memory stores program instructions which can be executed by the processor, and the processor calls the program instructions to execute the method for precisely controlling the initial caving pressure relief of the working face. The invention also provides a computer readable storage medium, which is characterized in that the computer readable storage medium stores computer instructions, and the computer instructions enable the computer to execute the method for precisely controlling the initial caving and pressure relief of the working surface. The invention has the advantages that: according to the invention, the weakening ring is constructed behind the cut through the hydraulic fracturing technology, so that the boundary condition of the top plate can be changed, the limit span of the top plate can be reduced, and the accurate control of the primary breaking step distance of the top plate can be realized by combining an empirical formula and drilling parameter regulation and control. Drawings FIG. 1 is a flow chart of a method for precisely controlling initial roof-caving and pressure-relief of a working surface according to an embodiment of the invention. Detailed Description For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Referring to fig. 1, a flow chart of a method for precisely controlling initial caving and pressure relief of a working surface according to an embodiment of the invention is shown. In this embodiment, the method for precisely controlling the initial caving and pressure relief of the working surface includes: s1, performing directional fracturing on a top plate behind a coal mine working face cut hole to obtain the top plate comprising the weakening ring. In the embodiment of the invention, the directional fracturing is to construct a row of top cutting and drilling holes in the top plate behind the working face cutting holes, and