The Project of National 973 Plan
Theories of Coal and Gas Simultaneous Extraction in the Deep Coal Exploitation
Project Number: 2011CB201200, Chief scientist: Xie Heping
Brief Introduction of the Project
The engineering practice of coal and gas simultaneous extraction in China is taking shape, but scientific, effective and specific basic theoretical system of coal and gas simultaneous extraction has not formed yet. In light of the three prominent features – “deep zone (high stress, high gas, strong adsorption), high strength and low permeability”, this project reveals Macro and Micro surface features of deep-mining gas-bearing coal rock body and crack evolution rules, gas absorption, desorption and migration rules, and material flow rules, develops and completes temporal and spatial evolution rules and distribution rules of deep stress field – fissure field – gas field coupling, establishes formation mechanism of gas enrichment and guiding flow in the deep strong unloading condition as well as space-and-time coordination mechanism of deep coal and gas simultaneous extraction, and forms theoretical system and technical methods of scientific, effective and specific deep coal and gas simultaneous extraction, which provides scientific and theoretical foundations for the safe, efficient, clean exploitation and sustainable development of deep coal resources and promotes the development of relative disciplines. With CUMT as the first undertaking unit, this project is headed by the academician Xie Heping, pools the main research strengths in the field of coal resources exploitation and gas controls in China, relying on 6 national key laboratories, 9 key laboratories at the ministerial level and 3 national engineering research centers and the advantages of each relative research units to study deep coal and gas simultaneous extraction theories together.
The Spatial Distribution Evolution of Micro-cracks of Coal Rock Mass with Different Mining Methods
Research on the Adsorption Characteristics of Methane in Different Models