In the heart of China’s Shandong Province, a groundbreaking study is redefining the future of energy in mining regions. Led by Qipeng Shi of the Shandong Provincial Bureau of Geology and Mineral Resources, this research is not just about tapping into new energy sources; it’s about transforming the very essence of how we think about coalfields and their role in a sustainable future.
The Jining Coalfield, a sprawling expanse of land rich in coal, is now being eyed for a different kind of treasure: geothermal energy. Shi and his team have uncovered a vast reservoir of geothermal resources hidden within the voids left by coal mining and drainage activities. This isn’t just a scientific curiosity; it’s a game-changer for the energy sector.
“Geothermal energy is not a new concept, but its application in coalfields is revolutionary,” Shi explains. “By utilizing the thermal reservoirs and recoverable reserves within these mines, we can significantly reduce greenhouse gas emissions and promote a green transformation in mining areas.”
The numbers speak for themselves. The Jining Coalfield alone holds an estimated 1.05 × 1015 kJ of geothermal resources, equivalent to a staggering 3.6 billion tons of standard coal. Of this, 1.05 × 1014 kJ is recoverable, which translates to 360,000 tons of standard coal. The potential for reducing CO2 emissions is immense, with projections indicating a possible reduction of approximately 8.59 million tons of CO2.
But how does this translate into practical, commercial impacts? For operational mines, the study proposes two technical schemes: utilizing mine air return heat energy and mine drainage waste heat. These methods not only enhance energy efficiency but also reduce energy waste, making them commercially viable and environmentally friendly.
For closed mines, the study introduces innovative models like “extracting heat without extracting water” and “extracting heat without consuming water.” These models are designed to conserve water resources while promoting sustainable geothermal utilization, opening up new avenues for economic growth in mining regions.
The research doesn’t stop at theory. A geothermal heating demonstration project has already been completed, covering a heating area of 50,000 square meters. This project saves 118.04 tons of standard coal annually and reduces CO2 emissions by 281.64 tons per year, setting a sustainable model for geothermal resource development and utilization.
The implications for the energy sector are profound. This research, published in the Journal of Engineering Science, provides crucial technical support for the comprehensive utilization of geothermal energy in mines. It aligns with China’s “carbon peaking and carbon neutrality” goals, paving the way for a future where mining areas can optimize their energy structure, reduce reliance on fossil fuels, and promote diversified economic growth.
As we stand on the cusp of a new energy era, Shi’s work offers a glimpse into a future where coalfields are not just sources of fossil fuels but also reservoirs of clean, green energy. The commercial potential is vast, and the environmental benefits are immeasurable. This is not just about energy; it’s about a sustainable future for us all.