coalpitn.煤坑；炭灶coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coalmine geographic space煤矿地理空间coal and rock combination组合煤岩coal-blended combustion混煤掺烧coal resource reservation煤炭资源赋存coal economic forecasting煤炭经济预测Coal gangue de-watering煤矸石脱水coal mine security system煤矿安全系统coal carbonization coking焦化coal preserving structure贮煤构造coal tar crude anthracene煤焦油粗蒽