建筑物下大采深坚硬顶板煤层条带开采技术

针对开滦林西煤矿井田东部地面建筑物下大量压煤的现状,进行了建筑物下大采深(九东、十东)坚硬顶板煤层条带开采技术研究.为提高采出率,利用煤层采深大、非充分采动、顶板坚硬的特点,确定了合理的采留宽度,并对条带留设煤柱进行了二次开采.通过改变回采工艺和有序协调开采,对坚硬顶板实行浅孔强制放顶,达到了地表变形小,地面建筑物不损坏、不搬迁、不维修以及工作面安全开采的目的.

Strip mining technology in seam with deep mining depth and hard roof under building structures

According to the present status of great coal under the building structures in the east part of Linxi Mine coalfield,Kailuan,a research on the strip mining in the seam(No.9 East and No.10 East) with hard roof and deep mining depth under the building structures was conducted.In order to improve the coal mining rate,with the features of the deep mining depth,non fully mining activity and hard roof of the seam,the rational mining width and coal pillar width was set up and the secondary mining on coal pillars w...