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大埋深三软煤层复合顶板大断面开切眼支护技术

大埋深三软煤层复合顶板大断面开切眼支护技术

Support technology of large section and compound roof open-off cut in soft roof and soft floor and soft coal and deep buried seam

Support technology of large section and compound roof open-off cut in soft roof and soft floor and soft coal and deep buried seam

doi:
10.13199/j.cnki.cst.2017.12.008
摘要:
为满足综采工作面大功率设备的运输和安装需要,解决传统支护方式无法满足开切眼断面大、跨度大等支护问题.采用理论分析与现场监测方法,研究大埋深三软煤层复合顶板条件下大断面大跨度开切眼支护技术,开切眼宽度为10 m,高度为4.3 m,断面面积达43 m2,并对支护效果进行检验.研究结果表明:采用高强度锚杆锚网带+长短锚索托梁联合支护技术加固围岩,形成一个超强、超厚、稳定、相互叠加的加固拱、组合梁,其顶板最大下沉量188 mm,两帮最大移近量376 mm,能够有效地控制开切眼围岩破坏变形,满足工作面运输安装的要求.
Abstract:
In order to meet the needs of transportation and installation of high-power equipment in fully-mechanized mining face,the traditional support methods can not meet the support problems of large section and large span open-off cut.The theoretical analysis and onsite monitoring methods are used to study the large section and large span open-off cut support technology under the conditions of deep soft roof in soft roof and soft floor and soft coal and deep buried seam.The width of open-off cut is 10 m,the height is 4.3 m,the cross-sectional area is 43 m2,and test the support effect.The results show that the use of high-strength anchor bolt and anchor + long-short cable anchor trusses supporting technology to reinforce the surrounding rock to form a super-strong,super-thick,stable,superimposed on the reinforcement arch,composite beams,the maximum roof sinking amount of 188 mm,the maximum displacement of two wall 376 mm,the technology can effectively control the open-off cut rock failure and deformation,to meet the requirements of the face of the transport installation.
作者 孙海良
Author: SUN Hailiang
作者单位 平顶山天安煤业股份有限公司开拓处,河南平顶山,467000
期 刊: 煤炭科学技术 ISTIC EI SCI PKU CSSCI
Journal: Coal Science and Technology
年,卷(期) 2017, 45(12)
分类号 TD323
关键词: 大断面大跨度开切眼 知识脉络 三软煤层 知识脉络 复合顶板 知识脉络 锚网(索)托梁联合支护 知识脉络
Keywords: large section and large span open-off cut soft roof and soft floor and soft coal seam compaound roof,combined support with bolt-mesh-cable and joist
机标分类号 TD3 TD2
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