Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education Chongqing University Chongqing 400030 China;
Chongqing Industry Polytechnic College Chongqing 400044 China;
Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education Chongqing University Chongqing 400030 China;
Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education Chongqing University Chongqing 400030 China;
Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education Chongqing University Chongqing 400030 China;
cyclic loading; sandstone; acoustic emission(AE); location; damage evolvement;