无煤柱自成巷三维地质力学模型试验系统研制与工程应用  

Development of a 3D geomechanical model test system for non-pillar mining with automatically formed roadway and its engineering application

作　　者：王琦[1,2,3] 江贝[1,3] 辛忠欣[2,3] 何满潮 李术才[2] 张朋[2,3] 王悦[2,3] 蒋振华 WANG Qi;JIANG Bei;XIN Zhongxin;HE Manchao;LI Shucai;ZHANG Peng;WANG Yue;JIANG Zhenhua(State Key Laboratory for Geo-mechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China;Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan,Shandong 250061,China;Research Institute of Deep Underground Science and Engineering,China University of Mining and Technology,Beijing 100083,China;Shandong Tianqin Engineering and Technology Limited Company,Heze,Shandong 274799,China)

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]山东大学岩土工程中心,山东济南250061 [3]中国矿业大学(北京)深地空间科学与工程研究院,北京100083 [4]山东天勤工程科技有限公司,山东菏泽274799

出　　处：《岩石力学与工程学报》2020年第8期1582-1594,共13页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51874188);山东省重大科技创新工程项目(2019SDZY04);山东省高等学校“青创科技计划”项目(2019KJG013)。

摘　　要：切顶卸压无煤柱自成巷技术是一种新型煤炭开采方法,利用矿山压力做功与岩体碎胀特性自动形成巷道,实现了煤炭开采无巷道掘进、无煤柱留设。为深入研究无煤柱自成巷开采全过程的覆岩运动机制、矿压显现规律与自成巷变形破坏机制,自主研发了切顶卸压无煤柱自成巷三维地质力学模型试验系统,由反力液压加载系统、自动采煤成巷系统和高精实时监测系统组成。试验系统配备无煤柱自成巷推采、切缝、成巷等核心工艺的成套模拟试验装置,实现无煤柱自成巷采掘留一体化开采全过程的真实模拟与完整工作面矿压规律的监测分析,通过组合式反力装置,可开展5.5 m×2.4 m×3.0 m(长×高×宽)以内不同尺寸模型体的地质力学模型试验。以我国首个N00工法工作面——柠条塔煤矿S1201–II工作面为工程背景,利用该试验系统开展了无煤柱自成巷工艺中最复杂的N00工法的三维地质力学模型试验,揭示了N00工法开采的矿压显现规律,得到了自成巷围岩变形控制机制,明确了自成巷关键破坏部位,提出了相应的工程建议,指导了现场设计与应用。现场试验与模型试验结果相一致,验证了模型试验系统研发与应用的合理性与有效性。The non-pillar mining technology of roof cutting and pressure releasing with automatically formed roadway(AFR) is a new type of coal mining method,which takes advantage of the mining pressure and rock mass expansion characteristic to automatically form roadways and hence,achieves coal mining without requiring excavating mining roadways and reserving protective coal pillars. In order to study the movement mechanism of overlying strata,the mining pressure behavior and failure mechanism of AFR in the whole mining process of the non-pillar mining with AFR,a 3 D geomechanical model test system for non-pillar mining with AFR was independently developed,which composes of reaction and hydraulic loading subsystem,automatic mining and roadway forming subsystem and high-precision real-time monitoring subsystem. The model test system,equipped with a complete set of test devices to simulate the core techniques such as mining,roof pre-splitting and roadway automatic forming,can actually simulate the whole mining process of mining and forming roadway integration by the non-pillar mining technology of roof cutting and pressure releasing with AFR and monitor the mining pressure of whole working face. The geomechanical model tests with different model sizes in the range of 5.5 m in length,2.4 m in height and 3.0 m in width can be carried out through a combined anti-force device. Taking the China’s first working face of N00 technology—S1201–II working face of Ningtiaota Mine Coal as the engineering background,the 3 D geomechanical model test was carried out by applying the model test system to study the most complicated N00 technology in non-pillar mining technologies with AFR. The mining pressure behavior of N00 technology was revealed and the control mechanism of the AFR surrounding rock was cleared. The key control positions of AFR were obtained,and the corresponding engineering suggestions were put forward to guide the following field application. The field monitoring results are basically consistent with the model test,w

关 键 词：采矿工程 无煤柱自成巷 地质力学模型试验 试验系统研发 N00工法 现场应用 

分 类 号：TD32[矿业工程—矿井建设]