This research reviewed the mechanics and gas desorption properties of intact coal, and tested the crushing work ratios of different intact coals, and then, studied the stress conditions for the failure or crushing of intact coal and the gas demand for the pulverization of intact coal particles. When a real-life outburst case is examined, the required minimum stress for intact coal outburst is estimated. The study concludes that the crushing work ratios of three intact coal samples vary from 294.3732 to 945.8048 J/m². For the real-life case, more than 2300 MJ of transport work is needed, and 10062.09, 7046.57 and 5895.47 m³ of gas is required when the gas pressure is 1, 2 and 3 MPa, respectively. The crushing work exceeds the transport work and even reaches 13.96 times of the transport work. How to provide such an enormous crushing work is an energy-limiting factor for the outburst in intact coal. The strain energy is needed for the crushing work, and the required minimum stress is over 54.35 MPa, even reaching 300.44 MPa. These minimum stresses far exceed the in-situ vertical and horizontal stresses that can be provided at the 300–700 m mining depth range.

本研究综述了完整煤的力学和解吸特性，测试了不同完整煤的破碎功比，进而研究了完整煤破坏或破碎的应力条件以及完整煤颗粒粉化所需的气体需求。 . 当检查真实的突出案例时，可以估计完整煤突出所需的最小应力。研究得出结论，三个完整煤样的破碎功比从 294.3732 到 945.8048 J/m ²不等。对于实际情况，需要超过 2300 MJ 的运输功，以及 10062.09、7046.57 和 5895.47 m ³当气体压力分别为 1、2 和 3 MPa 时，需要的气体量。破碎功超过运输功，甚至达到运输功的13.96倍。如何提供如此巨大的破碎功是完整煤中突出的能量限制因素。破碎工作需要应变能，所需的最小应力超过54.35 MPa，甚至达到300.44 MPa。这些最小应力远远超过了在 300-700 m 开采深度范围内可以提供的原位垂直和水平应力。