大断面煤巷快速掘进二次支护理论研究

李学彬

(北京中煤矿山工程有限公司，北京 100013)

[摘要]在改进煤巷掘进工艺的基础上较为系统地提出大断面煤巷快速掘进二次支护理论(简称煤巷二次支护)，将煤巷一次成巷支护分为掘进安全支护和补强稳定支护，并分析两次支护的时空关系及应用效果。通过理论分析可知，掘进安全支护施工后，煤巷支护为局部的低强度柔性支护，允许围岩变形，保证煤巷掘进空间安全；补强稳定支护施工后，煤巷支护是全面的高强度刚性支护，限制围岩有害变形，维持巷道围岩的长期稳定。结合马道头5203回风巷的工程地质条件，通过数值分析和工业性试验可知，煤巷二次支护技术能够在保证煤巷掘进空间安全前提下，提高煤巷掘进速度。

[关键词]大断面煤巷；快速掘进；二次支护；数值模拟；工业性试验

[中图分类号]TD353[文献标识码]A

[收稿日期]2014-06-23

DOI[]10.13532/j.cnki.cn11-3677/td.2015.01.016

[项目基金]国家自然科学基金重点项目(51134025)

[作者简介]李学彬 (1981-)，男，山东潍坊人，助理研究员，主要从事巷道支护研究工作。

Secondary Supporting Theory of Fast Driving Large-section Coal Roadway

LI Xue-bin

(Beijing Zhongmei Mine Engineering Co., Ltd., 100013, China)

Abstract：On the basis of improving coal roadway driving technique, secondary supporting theory of fast driving large-section coal-roadway was put forward which divided one-time supporting into safe supporting in driving and reinforcement supporting.Time and space relation between the two supporting and application effect was analyzed.By theoretical analysis, it was known that after safe supporting in driving, the supporting was local flexible supporting with low strength and permit deformation.After reinforcement supporting, it became wholly-rigid supporting with high strength, control harmful deformation and keep long-term stability of surrounding rock.Industrial test in 5203 air-roadway of Madaotou Colliery showed that secondary supporting technology could improve driving speed of coal roadway on the premise of keeping safety of driving mining.

Keywords：large-section coal roadway；fast driving；secondary supporting；numerical simulation；industrial test

[引用格式]李学彬.大断面煤巷快速掘进二次支护理论研究[J].煤矿开采，2015，20(1)：51-55.

近几年煤矿采掘的比例一直维持在1∶3.1左右，采掘比例失调，综掘的发展远滞后于综采。而煤巷掘进是一个综合的施工工艺，它不仅取决于掘进设备的现代化程度，而且与各施工工序紧密相连。大断面煤巷快速掘进要求一次成巷，把煤巷掘进工作面的支护如锚杆和锚索完成后才进行……