Geological Structure Exploration of Karst Collapse Column and Evaluation of Water Insulation Properties of the Mud Part

Table 1

Mineral composition of interstitial materials.

Interstitial material	Composition (%)
	Quartz	Montmorillonite	Kaolinite	Sodium feldspar	Chlorite	Calcite	Hematite	Other
Purplish-red mudstone	41.15	18.67	3.6	15.36	10.41	6.95	1.21	2.65
Grey mudstone	46.41	16.79	13.56	10.72	8.27	—	—	3.25