我国放顶煤开采的理论研究与实践

我国厚煤层地下开采产量占40%左右。近年来,特厚煤层综合机械化放顶煤开采在理论研究和实践方面都取得了一些重要的进展。本文对放顶煤开采时顶煤运动和矿压显现规律、放煤参数和放煤方式选择的依据、提高回收率的途径、放顶煤液压支架的现状及其评价、放顶煤开采的安全技术等主要问题作了广泛的介绍,以期读者对我国放顶煤开采的概貌有一个总的认识。

THEORY AND PRACTICE OF SUB-LEVEL CAVING METHOD IN CHINA

The coal production from thick coal seams accounts for about 40% of thetotal in this country.In the recent years,mechanized sub-level caving for verythick coal seams has achieved important progress both in theory and in practice.This paper describes the important technical aspects,e.g.the rules of roof coalmovement and rock behaviour,parameters for drawing coal,criteria for selectionof coal drawing method,approaches for increasing the recovery rate,the presentstatus of powered supports and their evaluation,and safety.I hopes that thereaders will have a general idea of the development of sub-level caving method inChina.