条带煤柱渐进破坏失稳灾变机理及性能提升

项目名称： 条带煤柱渐进破坏失稳灾变机理及性能提升

项目编号： No.51474134

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 陈绍杰

作者单位： 山东科技大学

项目金额： 86万元

中文摘要： 我国条带煤柱数量巨大，煤柱失稳会诱发多种矿山灾害。本课题采用现场调研、理论分析、力学试验、相似模拟、数值模拟、现场试验与工程反馈的方法开展如下研究。①与常规蠕变试验不同，从煤岩试样边缘渐进破坏进程和破坏后至失稳前的各部位力学特性入手，研究煤岩长期承载过程中的突变破坏机理和失稳判据。②煤柱变形与稳定性之间的关系，煤柱破坏与失稳的差别及破坏到失稳的演化过程，不同条件下煤柱的允许破坏范围和程度，建立煤柱变形预测煤柱失稳的预测方法。③以煤柱-覆岩作为整体研究提高煤柱性能尤其是煤柱边缘性能的可能性和可行性方法，初步确立针对条带煤柱诱发的不同灾害的煤柱性能提升方法。④研究不同条件下条带开采覆岩结构模型、条带煤柱失稳对地表塌陷的诱灾机理、规律、工程物理力学模型及防治方法。课题研究将为条带煤柱失稳灾变机理及安全防护提供新的理论基础，对条带煤柱的合理留设和提高回收率、煤柱失稳诱发的灾害防治具有重要意义。

中文关键词： 条带煤柱；渐进破坏；失稳机理；灾变机理；性能提升

英文摘要： There are a large number of strip coal pillars, and the destabilization of the coal pillar will induce a variety of mine disasters. Some studies will be carried through site investigation, theoretical analysis, mechanical test, similar simulation, numerical simulation, field test and engineering feedback as follows. ①The abrupt failure mechanism and the stability-lost criterion of coal under long-term loading (not creep), the gradually destroy process and mechanism from the edge and mechanical properties in various parts after damage but not stability-lost of large size coal specimen. ②The relationship between the deformation and the stability of coal pillar, the difference between the coal pillar failure and stability-lost, and the evolution process from failure to stability-lost，the damage range and degree allowed in different conditions, stability-lost prediction method of strip coal pillar. ③The possibility and feasibility method of improve the coal pillar especially pillar edge's performance, and the different improve method would be establishment aimed at different disaster induced by pillar instability. ④The strip mining overburden structure models under different conditions, the disaster-caused mechanism and pattern of subsidence induced from pillar lost stability. The research will provide a new theoretical basis for stability-lost causing disaster mechanism of coal pillar in strip mining and safety protection, and has important significance in strip pillar remained reasonable, recovery rate enhancing, and disaster prevention induced from strip pillar stability-lost.

英文关键词： strip coal pillar;progressive failure;unstability mechanism;disaster-causing;performance improvement