隔水关键层原理及其在保水采煤中的应用论述.pdf

第37卷第1期 中国矿业大学学报 V01．37 No．1 2008年1月 Journal of China University of Mining＆Technology Jan．2008 隔水关键层原理及其在保水采煤中的应用研究 缪协兴，浦 海，白海波 (中国矿业大学深部岩土力学与地下工程国家重点实验窒，江苏徐州 221008) 摘要：既要防治煤矿突水灾害又要保护矿区水资源，实现保水采煤是绿色开采技术的核心内容 之一．通过研究建立了保水采煤的隔水关键层矿压模型，同时提出了可用于指导开发保水采煤技 术的隔水关键层原理．隔水关键层模型有3层含意，即软弱层岩性隔水、坚硬层结构隔水和裂隙 通道弥合隔水．保水采煤原理可分解为4个步骤，即隔水关键层位置判别、结构稳定性判别与控 制、渗流稳定性判别与控制以及渗流突变通道控制．保水采煤的隔水关键层原理在采场顶底板突 水灾害防治中得到了成功应用． 关键词：绿色开采；保水采煤；隔水关键层；矿压模型；突水灾害防治 中图分类号：TD 163 文献标识码：A 文章编号：1000-1964(2008)01—0001—04 Principle of Water—Resisting Key Strata and Its Application in Water—Preserved Mining MIAO Xie—xing．PU Hai，BAI Hai—bo (State Key Laboratory for Geomechanics＆Deep Underground Engineering，China University of Mining＆Technology。 Xuzhou，Jiangsu 221008，China) Abstract：It is important to prevent the water inrush as well as to protect the water resource in coal mining．Water—preserved mining is one of the important contents in the green mining tech— nological system．In this paper，a rock pressure model of water—resisting key strata(WKS)in water—preserved mining is proposed，and a principle of WKS is presented for instructing and developing the water—preserved mining technology．The model of WKS has following three meaning：1ithologic water—resisting with weak rock 1ayer，structure water—resisting with hard rock layer and water—resisting with the fracture passage closing．The principle of WKS is con— sist of four steps，including the position determination of WKS，structure stability determina— tion and controlling，seepage stability determination and controlling，and the seepage mutation passage controlling．The principle of WKS in water—preserved mining has been successfully ap— plied to the disaster prevention of water inrush from roof and floor in working face． Key words：green mining；water—preserved mining；water—resisting key strata；rock pressure model：disaster prevention of water inrush 我国煤矿群死群伤特大事故主要由瓦斯和突 水灾害造成，遏制瓦斯和突水事故是我国煤矿安全 控制的主攻目标．并且，突水造成的直接经济损失 一直十分严重．过去20 a问，有250多对矿井被水 淹没，直接经济损失高达350多亿元． 近年来，矿井突水灾害呈不断上升