赵社会, 张广杰, 王文.深埋薄基岩综放工作面切顶卸压沿空留巷围岩协同控制技术研究[J].河南理工大学学报（自然科学版）,2022,41(1):29-42.

ZHAO S H, ZHANG G J, WANG W. Study on coordinated control technology of surrounding rock in self-made roadway without coal pillar in roof-cutting and pressure-relief of fully-mechanized caving face with deep buried thin bedrock[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(1):29-42.

深埋薄基岩综放工作面切顶卸压沿空留巷围岩协同控制技术研究

赵社会1, 张广杰2, 王文3

1.焦作煤业集团赵固（新乡）能源有限责任公司，河南 新乡 453634；2.河南理工大学 河南理工产业技术研究院，河南 焦作 454000；3.河南理工大学 能源科学与工程学院，河南 焦作 454000

摘要:为解决深埋薄基岩切顶卸压沿空留巷巷道受采动影响支护困难的问题，以焦作煤业集团赵固（新乡）能源有限责任公司赵固一矿18060综放工作面切顶卸压沿空留巷巷道为工程背景，基于留巷围岩结构运动和覆岩力学传递特征，提出深埋薄基岩切顶卸压沿空留巷巷道围岩协同控制技术。研究结果表明：采用定向预裂爆破技术能够切断留巷顶板下位关键岩层，并形成短壁梁结构；与未切顶相比，切顶后巷道侧向支承压力减小14.17 MPa（降低37.67% ），顶板竖向应力峰值减小5.22 MPa（降低22.5%兀切顶侧矿压较未切顶侧明显降低，切顶影响范围约30 m；留巷两帮收缩量最大为471 mm，顶底板移近量最大为717 mm，工作面后方约200 m开始稳定。提出的深埋薄基岩切顶卸压沿空留巷围岩协同控制技术现场应用效果较好，可为类似地质条件下的切顶卸压沿空留提供参考。

关键词:综放工作面;煤柱;切顶卸压;沿空留巷;预裂爆破;围岩协同控制

doi:10.16186/j.cnki.1673-9787.2021010080

基金项目:国家自然科学基金资助项目（51604093）

收稿日期:2021/01/18

修回日期:2021/05/11

出版日期:2022/01/10

Study on coordinated control technology of surrounding rock in self-made roadway without coal pillar in roof-cutting and pressure-relief of fully-mechanized caving face with deep buried thin bedrock

ZHAO Shehui 1, ZHANG Guangjie 2, WANG Wen 3

1.Zhaogu （ Xinxiang） Energy Co. ,Ltd. ,Jiaozuo Coal Industry Group ,Xinxiang  453634 ,Henan,China；2.Henan Institute of Technology,Henan Polytechnic University,Jiaozuo  454000 ,Henan,China；3.School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo  454000 ,Henan，China

Abstract:  In order to solve the problem of support difficulty of deep gob side entry retaining affected by mining，taking the gob side entry retaining of 18060 fully mechanized top coal caving face in Zhaogu No.1 mine as the engineering background，based on the movement of surrounding rock structure and mechanical transfer characteristics of overlying rock，the coordinated control system of surrounding rock of deep gob side entry retaining was proposed.The study results showed that the directional presplitting blasting technology could cut off the key strata under the roof of the retaining roadway and formed a short wall beam structure; Compared with no roof cutting，the lateral abutment pressure of roadway after roof cutting decreased by 14.17 MPa( 37.67% ) ,and the peak vertical stress of roof decreased by 5.22 MPa( 22.5% ) ; The rock pressure on the cutting side was significantly lower than that on the non cutting side，and the influence range of cutting was about 30 m; The maximum shrinkage of the two sides of the retained roadway was 471 mm，the maximum approach of the roof and floor was 727 mm，and it started to stabilize about 200 m behind the working face.The field application effect was good，which could provide technical reference for the application of roof-cutting and pressure-relief without coal pillar self forming roadway under similar engineering conditions.

Key words:coal pillar;roof-cutting and pressure-relief;roadway without coal pillar;presplitting blasting;sur-rounding rock;coordinated control

 深埋薄基岩综放工作面切顶卸压沿空留巷围岩协同控制技术研究_赵社会.pdf