Multi-coal seam room-pillar type coal pillar stability evaluation method and system
An evaluation method, room-and-pillar technology, applied in earth square drilling, surface mining, instruments, etc.
Active Publication Date: 2021-12-24
NORTH CHINA INST OF SCI & TECH +2
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[0005] The purpose of this application is to provide a multi-coal seam room-pillar type coal pillar stability evaluation method and system to solve or alleviate the problems existing in the above-mentioned prior art
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[0034] The present application will be described in detail below with reference to the accompanying drawings and embodiments. Each example is provided by way of explanation of the application, not limitation of the application. In fact, those skilled in the art will recognize that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Accordingly, it is intended that the present application cover such modifications and variations as come within the scope of the appended claims and their equivalents.
[0035]In the description of this application, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientation or positional relationship indicated by "top", "bottom", etc. is based on the orient...
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The invention relates to the technical field of mining, and provides a multi-coal seam room-pillar type coal pillar stability evaluation method and system. The method comprises the following steps: according to point type ground stress measurement data of a shallow-buried room-and-pillar goaf of multiple coal seams, performing reverse inversion to obtain coal-rock mass stress field data of the shallow-buried room-and-pillar goaf; according to the coal and rock mass stress field data of the shallow-buried room and pillar type goaf, based on a pre-constructed multi-coal-seam engineering geologic model, obtaining energy data of a coal and rock mass of the shallow-buried room and pillar type goaf under the action of excavation disturbance factors in the coal seam excavation process; and according to the energy data of the coal and rock mass of the shallow-buried room-and-pillar goaf, determining a danger level of a large-area suspended roof area of the shallow-buried room-and-pillar goaf so as to perform stability evaluation on the shallow-buried room-and-pillar goaf. Therefore, through quantitative description of the strain energy, positioning and quantitative analysis of large-area suspended roof dynamic disasters are realized.
Description
technical field [0001] The present application relates to the field of mining technology, in particular to a method and system for evaluating the stability of multi-coal seam room-and-pillar coal pillars. Background technique [0002] A coal pillar is a piece of coal that remains in a natural state in order to preserve the roadway space or control the settlement of the overlying strata during the mining process of the working face. It is a very important structure in underground mining of coal resources. At the same time, in order to rationally exploit coal resources and protect buildings, water bodies, railways, etc., setting up coal pillars is also an essential work. Therefore, evaluating the stability of coal pillars is very important for mine safety production. [0003] The current methods for analyzing the stability of coal pillars, due to the existence of complex and diverse stresses on coal pillars, non-uniform stress distribution, non-uniform coal rocks, weak-struct...
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IPC IPC(8): G06F30/20G06F30/13E21C41/18G06F119/14
CPCG06F30/20G06F30/13E21C41/18G06F2119/14
Inventor 李正胜李健李刚强连登学赵杰易海洋
Owner NORTH CHINA INST OF SCI & TECH