为了研究掘进巷道掘进头煤与瓦斯突出产生及持续的力学条件，针对影响煤与瓦斯突出及其持续发生的主要因素，采用WY-98B型瓦斯吸附常数测定仪，进行不同温度、压力情况下煤吸附瓦斯的实验研究；利用MTS8150.4型电液三轴伺服试验系统，进行煤岩单轴和三轴压缩试验，研究煤岩的强度分布特征。依据实验和理论分析结果，给出煤与瓦斯突出及其持续发生的多尺度力学条件，得到的主要结论如下： （1）不同煤样的等温吸附线不同，在常温态附近，温度越高吸附常数a、b越小；煤体对瓦斯的吸附量随着温度的升高而变小，压力越大，煤体吸附量随吸附温度变化趋势越明显，在相同温度变化趋势下不同煤的吸附常数的变化趋势不同。 （2）由于煤岩内部的无序性使得煤的脆性断裂强度呈现非均匀分布，不同煤的脆性断裂强度的也存在着较大的差异。煤岩的断裂强度的近似正态分布规律同Weibull分布相比，能够更加清晰的解释煤样破坏的时应力在一定范围内的集中问题。 （3）在球壳失稳理论的基础上，联系实验规律得出了突出发生的多尺度力学条件，以及在温度压力等因素下，进行煤与瓦斯突出预测的概率。 （4）煤与瓦斯突出过程中，破碎煤粒与瓦斯组成的二相流的分布密度和巷道中能量分布密度大小随距煤岩突出中心的距离的增大而减小；煤与瓦斯组成的二相流的突出势的大小随初始压力的增大而增大，初始压力越大其增大趋势也越大；温度、压力越大，突出势越大，越易发生突出；突出势大于零，突出得以持续发生，突出势小于零不容易发生持续突出。

In order to study the mechanical conditions of that coal and gas outburst develops and lasts in drifting tunnel, experiments on adsorbed gas-coal under different temperatures and pressures by WY-98B adsorbed gas-coal coefficient apparatus are conducted with considering major factors of coal and gas outburst. Unaxial and triaxial compression tests of coal samples are also conducted with MTS8150.4 electro-hydraulic triaxial servo testing system, which test results are analyzed for strength distributions of the samples. According to the experiment results and theoretical analysis, multi-scale mechanical conditions of that coal and gas outburst develops and lasts are presented. The main conclusions are as follows: (1) The adsorption isotherms of different coal samples are different. In normal mode, adsorption constants, a as well as b, decrease as the temperature increase. With the increase of the temperature, the quantity of adsorbed gas-coal decreases. With the increase of the pressure, the quantity of adsorbed gas-coal has significant change. When the temperature-change trend are same, adsorption constants-change trend of different coal samples are different. (2) Because of the randomness of coal samples, the brittle fracture strength distributions of coal samples appears non-uniform and the brittle fracture strength of different coals also have obvious difference. Regarding fracture strength of coal samples, compare with Weibull distribution, approximate normal distribution can clearly explain stress concentration of coal samples in a certain range. (3) On basis of the spherical shell destabilization theory and experimental law, multi-scale mechanical conditions of adsorbed gas-coal are presented. The predicted probability density function of coal and gas outburst under different temperature and pressure are also provided. (4) In the process of coal and gas outburst, probability density of two phase flow that consists of broken coal and gas as well as energy distribution density in roadway both decrease with the distance increase from the center of coal rock outburst. With increase of original pressure, outburst potential energy of two phase flow increase, and outburst potential energy-change trend is more obvious. With increase of temperature and pressure, coal and gas outburst can easily develop. If outburst potential is larger than zero, outburst can last. Otherwise, outburst is not easy to develop.