采场覆岩移动、裂隙演化及卸压瓦斯运移等规律是煤与瓦斯安全共采中的关键科学问题，目前国内外仍缺乏同步研究这些规律的三维物理相似材料模拟实验系统。针对该问题，本项目拟综合应用理论分析、实验研究、数值模拟和现场工业性试验等方法与手段，建立三维空间下的固气耦合相似原理，研制适合三维模拟实验的相似材料；采用模块式设计方法，研发具有自主知识产权的煤与瓦斯共采综合实验系统。该系统通过集成研发高强度刚体框架、开采系统、通风系统、瓦斯注入系统、瓦斯抽采系统、加载系统以及数据采集分析与控制系统等，使矿山压力分布规律、瓦斯运移规律、覆岩移动破坏规律、瓦斯抽采规律等一体、同步研究。从而有利于掌握采动裂隙时空演化与卸压瓦斯运移演化规律的定量化描述及相互影响关系，为进一步优化瓦斯抽采钻孔（或巷道）布置参数，提高瓦斯抽采效果，实现煤与瓦斯安全共采提供重要的实验技术手段。

The laws of the overlying strata movement, fracture evolution and relieved methane delivery are keys in simultaneous extraction of coal and coal bed methane. At present, there are still lack of physics resemble simulation experiment table which can research simultaneously. In this project, solid and gas coupling similar principle will be established and similar material will be manufactured of three-dimensional space based on theoretical analysis, experimental research, numerical stimulation, and industrial test. Using modular design method, a synthesized experiment system which has independent intellectual property will be researched and manufactured. In this system, an innovation will be made by putting the rigid framework, mining system, ventilation system, methane injecting system, methane drainage system, loading system and data acquisition and control system together. Based on this system, the laws of ground pressure distribution, methane migration, overlying strata movement and break and methane drainage can be researched simultaneously. In this way, the quantitative evolution of mining fracture and relieved methane delivery and the interaction between them can be found. Accordingly, the parameters of drainage holes (roadways) can be further optimized which will improve the effect of methane drainage and this system will provide an important method for realizing simultaneous extraction of coal and coal bed methane.