主要造岩矿物微波敏感性试验研究

采用频率2 450 MHz多模谐振腔对11种常见主要造岩矿物试样进行了微波辐射试验。根据升温速率和温度增量对其微波敏感性进行了研究。对赤峰玄武岩、鞍山辉长岩和昆明砂岩进行了矿物成分测试，根据其矿物成分组成预测3种岩石的微波吸收能力，通过微波辐射试验对预测结果进行了验证。然后对3种岩石进行了单轴压缩强度测试，研究了微波辐射后岩石的强度折减与岩石微波吸收能力的关系。结果表明：主要造岩矿物的微波吸收能力可分为3类，且表现出非常不同的微波吸收能力；根据岩石的矿物成分组成可预测岩石的微波吸收能力，含有强微波吸收能力矿物的岩石也具有较强的微波吸收能力；岩石的微波吸收能力越强，微波辐射后岩石单轴压缩强度的折减程度越大。

Experimental study of the microwave sensitivity of main rock-forming minerals

Microwave absorption tests were carried out on 11 typical rock-forming minerals using the 2450 MHz frequency multimode resonator. The microwave sensitivity of the minerals were studied according to the heating rate and temperature increment. This study determined the mineral compositions of Chifeng basalt, Anshan gabbro, and Kunming sandstone, respectively. Based on the obtained mineral compositions, the microwave absorptivity of three types of rocks was predicted and further verified by the microwave radiation testing results. Then the uniaxial compressive strength of three types of rocks was measured, and the relationship between the strength reduction and microwave absorption capacity of rock was analyzed after the microwave treatment. The results show that the microwave absorption capacity of the main rock-forming minerals can be divided into three categories. The microwave absorption capacity of rock can be predicted according to the mineral compositions of the rock. The rock containing the mineral with strong microwave absorption capacity also has a strong microwave absorption capacity. The stronger the microwave absorption capacity of the rock is, the greater the reduction of uniaxial compression strength after microwave radiation.