这个钻孔是用来探索遇困矿工所在位置的吗？
救援人员推测，这一钻孔的另一端即为遇困矿工所处的坑道。[{'character': '救', 'pinyin': 'jiou4', 'highest pitch': 11.1, 'lowest pitch': 9.25, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '援', 'pinyin': 'van2', 'highest pitch': 9.68, 'lowest pitch': 8.92, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 9.47, 'lowest pitch': 8.72, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '员', 'pinyin': 'van2', 'highest pitch': 9.68, 'lowest pitch': 7.52, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '推', 'pinyin': 'tuei1', 'highest pitch': 9.65, 'lowest pitch': 8.01, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '测', 'pinyin': 'ce4', 'highest pitch': 9.41, 'lowest pitch': 5.47, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.26}, {'character': '这', 'pinyin': 'zhe4', 'highest pitch': 11.48, 'lowest pitch': 9.53, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i2', 'highest pitch': 9.53, 'lowest pitch': 8.75, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '钻', 'pinyin': 'zuan4', 'highest pitch': 10.48, 'lowest pitch': 8.3, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '孔', 'pinyin': 'kong3', 'highest pitch': 8.3, 'lowest pitch': 4.59, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.09, 'lowest pitch': 4.59, 'duration': 0.07, 'prosody hierarchy': '#1'}, {'character': '另', 'pinyin': 'ling4', 'highest pitch': 10.28, 'lowest pitch': 6.0, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '一', 'pinyin': 'i4', 'highest pitch': 8.2, 'lowest pitch': 5.35, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '端', 'pinyin': 'duan1', 'highest pitch': 8.0, 'lowest pitch': 7.16, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.19}, {'character': '即', 'pinyin': 'ji2', 'highest pitch': 7.96, 'lowest pitch': 7.6, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 8.73, 'lowest pitch': 6.23, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '遇', 'pinyin': 'v4', 'highest pitch': 10.0, 'lowest pitch': 8.73, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '困', 'pinyin': 'kuen4', 'highest pitch': 9.49, 'lowest pitch': 8.19, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '矿', 'pinyin': 'kuang4', 'highest pitch': 9.84, 'lowest pitch': 7.33, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '工', 'pinyin': 'gong1', 'highest pitch': 9.23, 'lowest pitch': 7.33, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '所', 'pinyin': 'suo2', 'highest pitch': 10.43, 'lowest pitch': 7.95, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '处', 'pinyin': 'chu3', 'highest pitch': 6.82, 'lowest pitch': 5.54, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.09, 'lowest pitch': 5.58, 'duration': 0.08, 'prosody hierarchy': '#1'}, {'character': '坑', 'pinyin': 'keng1', 'highest pitch': 9.09, 'lowest pitch': 8.27, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '道', 'pinyin': 'dao4', 'highest pitch': 9.51, 'lowest pitch': 6.23, 'duration': 0.23, 'prosody hierarchy': '#4'}]